diff --git a/src/controllers/api/confirmGuildInvitationController.ts b/src/controllers/api/confirmGuildInvitationController.ts
index b4a10b98..11deac0c 100644
--- a/src/controllers/api/confirmGuildInvitationController.ts
+++ b/src/controllers/api/confirmGuildInvitationController.ts
@@ -62,7 +62,7 @@ export const confirmGuildInvitationGetController: RequestHandler = async (req, r
         await guild.save();
 
         res.json({
-            ...(await getGuildClient(guild, account._id.toString())),
+            ...(await getGuildClient(guild, account)),
             InventoryChanges: inventoryChanges
         });
     } else {
diff --git a/src/controllers/api/createGuildController.ts b/src/controllers/api/createGuildController.ts
index bbaecc19..ea0e48a6 100644
--- a/src/controllers/api/createGuildController.ts
+++ b/src/controllers/api/createGuildController.ts
@@ -1,5 +1,5 @@
 import { RequestHandler } from "express";
-import { getAccountIdForRequest } from "@/src/services/loginService";
+import { getAccountForRequest } from "@/src/services/loginService";
 import { getJSONfromString } from "@/src/helpers/stringHelpers";
 import { Guild, GuildMember } from "@/src/models/guildModel";
 import { createUniqueClanName, getGuildClient, giveClanKey } from "@/src/services/guildService";
@@ -7,11 +7,11 @@ import { getInventory } from "@/src/services/inventoryService";
 import { IInventoryChanges } from "@/src/types/purchaseTypes";
 
 export const createGuildController: RequestHandler = async (req, res) => {
-    const accountId = await getAccountIdForRequest(req);
+    const account = await getAccountForRequest(req);
     const payload = getJSONfromString<ICreateGuildRequest>(String(req.body));
 
     // Remove pending applications for this account
-    await GuildMember.deleteMany({ accountId, status: 1 });
+    await GuildMember.deleteMany({ accountId: account._id, status: 1 });
 
     // Create guild on database
     const guild = new Guild({
@@ -21,20 +21,20 @@ export const createGuildController: RequestHandler = async (req, res) => {
 
     // Create guild member on database
     await GuildMember.insertOne({
-        accountId: accountId,
+        accountId: account._id,
         guildId: guild._id,
         status: 0,
         rank: 0
     });
 
-    const inventory = await getInventory(accountId, "GuildId LevelKeys Recipes");
+    const inventory = await getInventory(account._id.toString(), "GuildId LevelKeys Recipes");
     inventory.GuildId = guild._id;
     const inventoryChanges: IInventoryChanges = {};
     giveClanKey(inventory, inventoryChanges);
     await inventory.save();
 
     res.json({
-        ...(await getGuildClient(guild, accountId)),
+        ...(await getGuildClient(guild, account)),
         InventoryChanges: inventoryChanges
     });
 };
diff --git a/src/controllers/api/getGuildController.ts b/src/controllers/api/getGuildController.ts
index b834c289..f99b8d1c 100644
--- a/src/controllers/api/getGuildController.ts
+++ b/src/controllers/api/getGuildController.ts
@@ -1,13 +1,13 @@
 import { RequestHandler } from "express";
 import { Guild } from "@/src/models/guildModel";
-import { getAccountIdForRequest } from "@/src/services/loginService";
+import { getAccountForRequest } from "@/src/services/loginService";
 import { logger } from "@/src/utils/logger";
 import { getInventory } from "@/src/services/inventoryService";
 import { createUniqueClanName, getGuildClient } from "@/src/services/guildService";
 
 export const getGuildController: RequestHandler = async (req, res) => {
-    const accountId = await getAccountIdForRequest(req);
-    const inventory = await getInventory(accountId, "GuildId");
+    const account = await getAccountForRequest(req);
+    const inventory = await getInventory(account._id.toString(), "GuildId");
     if (inventory.GuildId) {
         const guild = await Guild.findById(inventory.GuildId);
         if (guild) {
@@ -24,7 +24,7 @@ export const getGuildController: RequestHandler = async (req, res) => {
                 guild.CeremonyResetDate = undefined;
                 await guild.save();
             }
-            res.json(await getGuildClient(guild, accountId));
+            res.json(await getGuildClient(guild, account));
             return;
         }
     }
diff --git a/src/controllers/api/getGuildDojoController.ts b/src/controllers/api/getGuildDojoController.ts
index 3c48a4f4..7c5b9412 100644
--- a/src/controllers/api/getGuildDojoController.ts
+++ b/src/controllers/api/getGuildDojoController.ts
@@ -2,6 +2,7 @@ import { RequestHandler } from "express";
 import { Types } from "mongoose";
 import { Guild } from "@/src/models/guildModel";
 import { getDojoClient } from "@/src/services/guildService";
+import { Account } from "@/src/models/loginModel";
 
 export const getGuildDojoController: RequestHandler = async (req, res) => {
     const guildId = req.query.guildId as string;
@@ -25,7 +26,8 @@ export const getGuildDojoController: RequestHandler = async (req, res) => {
     }
 
     const payload: IGetGuildDojoRequest = req.body ? (JSON.parse(String(req.body)) as IGetGuildDojoRequest) : {};
-    res.json(await getDojoClient(guild, 0, payload.ComponentId));
+    const account = await Account.findById(req.query.accountId as string);
+    res.json(await getDojoClient(guild, 0, payload.ComponentId, account?.BuildLabel));
 };
 
 interface IGetGuildDojoRequest {
diff --git a/src/controllers/api/hostSessionController.ts b/src/controllers/api/hostSessionController.ts
index 1745d994..52c7a6a2 100644
--- a/src/controllers/api/hostSessionController.ts
+++ b/src/controllers/api/hostSessionController.ts
@@ -1,17 +1,24 @@
 import { RequestHandler } from "express";
-import { getAccountIdForRequest } from "@/src/services/loginService";
+import { getAccountForRequest } from "@/src/services/loginService";
 import { createNewSession } from "@/src/managers/sessionManager";
 import { logger } from "@/src/utils/logger";
 import { ISession } from "@/src/types/session";
+import { JSONParse } from "json-with-bigint";
+import { toOid2, version_compare } from "@/src/helpers/inventoryHelpers";
 
 const hostSessionController: RequestHandler = async (req, res) => {
-    const accountId = await getAccountIdForRequest(req);
-    const hostSessionRequest = JSON.parse(req.body as string) as ISession;
+    const account = await getAccountForRequest(req);
+    const hostSessionRequest = JSONParse(String(req.body)) as ISession;
     logger.debug("HostSession Request", { hostSessionRequest });
-    const session = createNewSession(hostSessionRequest, accountId);
+    const session = createNewSession(hostSessionRequest, account._id);
     logger.debug(`New Session Created`, { session });
 
-    res.json({ sessionId: { $oid: session.sessionId }, rewardSeed: 99999999 });
+    if (account.BuildLabel && version_compare(account.BuildLabel, "2015.03.21.08.17") < 0) {
+        // U15 or below
+        res.send(session.sessionId.toString());
+    } else {
+        res.json({ sessionId: toOid2(session.sessionId, account.BuildLabel), rewardSeed: 99999999 });
+    }
 };
 
 export { hostSessionController };
diff --git a/src/controllers/api/startDojoRecipeController.ts b/src/controllers/api/startDojoRecipeController.ts
index d2865165..0773f252 100644
--- a/src/controllers/api/startDojoRecipeController.ts
+++ b/src/controllers/api/startDojoRecipeController.ts
@@ -11,7 +11,7 @@ import {
 import { Types } from "mongoose";
 import { ExportDojoRecipes } from "warframe-public-export-plus";
 import { config } from "@/src/services/configService";
-import { getAccountIdForRequest } from "@/src/services/loginService";
+import { getAccountForRequest } from "@/src/services/loginService";
 import { getInventory } from "@/src/services/inventoryService";
 
 interface IStartDojoRecipeRequest {
@@ -20,10 +20,10 @@ interface IStartDojoRecipeRequest {
 }
 
 export const startDojoRecipeController: RequestHandler = async (req, res) => {
-    const accountId = await getAccountIdForRequest(req);
-    const inventory = await getInventory(accountId, "GuildId LevelKeys");
+    const account = await getAccountForRequest(req);
+    const inventory = await getInventory(account._id.toString(), "GuildId LevelKeys");
     const guild = await getGuildForRequestEx(req, inventory);
-    if (!hasAccessToDojo(inventory) || !(await hasGuildPermission(guild, accountId, GuildPermission.Architect))) {
+    if (!hasAccessToDojo(inventory) || !(await hasGuildPermission(guild, account._id, GuildPermission.Architect))) {
         res.json({ DojoRequestStatus: -1 });
         return;
     }
@@ -64,5 +64,5 @@ export const startDojoRecipeController: RequestHandler = async (req, res) => {
         setDojoRoomLogFunded(guild, component);
     }
     await guild.save();
-    res.json(await getDojoClient(guild, 0));
+    res.json(await getDojoClient(guild, 0, undefined, account.BuildLabel));
 };
diff --git a/src/managers/sessionManager.ts b/src/managers/sessionManager.ts
index d933407a..ed397823 100644
--- a/src/managers/sessionManager.ts
+++ b/src/managers/sessionManager.ts
@@ -1,10 +1,12 @@
 import { ISession, IFindSessionRequest } from "@/src/types/session";
 import { logger } from "@/src/utils/logger";
+import { JSONParse } from "json-with-bigint";
+import { Types } from "mongoose";
 
 const sessions: ISession[] = [];
 
-function createNewSession(sessionData: ISession, Creator: string): ISession {
-    const sessionId = getNewSessionID();
+function createNewSession(sessionData: ISession, Creator: Types.ObjectId): ISession {
+    const sessionId = new Types.ObjectId();
     const newSession: ISession = {
         sessionId,
         creatorId: Creator,
@@ -25,7 +27,7 @@ function createNewSession(sessionData: ISession, Creator: string): ISession {
         customSettings: sessionData.customSettings || "",
         rewardSeed: sessionData.rewardSeed || -1,
         guildId: sessionData.guildId || "",
-        buildId: sessionData.buildId || 4920386201513015989,
+        buildId: sessionData.buildId || 4920386201513015989n,
         platform: sessionData.platform || 0,
         xplatform: sessionData.xplatform || true,
         freePublic: sessionData.freePublic || 3,
@@ -40,13 +42,15 @@ function getAllSessions(): ISession[] {
     return sessions;
 }
 
-function getSessionByID(sessionId: string): ISession | undefined {
-    return sessions.find(session => session.sessionId === sessionId);
+function getSessionByID(sessionId: string | Types.ObjectId): ISession | undefined {
+    return sessions.find(session => session.sessionId.equals(sessionId));
 }
 
-function getSession(sessionIdOrRequest: string | IFindSessionRequest): { createdBy: string; id: string }[] {
-    if (typeof sessionIdOrRequest === "string") {
-        const session = sessions.find(session => session.sessionId === sessionIdOrRequest);
+function getSession(
+    sessionIdOrRequest: string | Types.ObjectId | IFindSessionRequest
+): { createdBy: Types.ObjectId; id: Types.ObjectId }[] {
+    if (typeof sessionIdOrRequest === "string" || sessionIdOrRequest instanceof Types.ObjectId) {
+        const session = sessions.find(session => session.sessionId.equals(sessionIdOrRequest));
         if (session) {
             logger.debug("Found Sessions:", { session });
             return [
@@ -79,35 +83,15 @@ function getSession(sessionIdOrRequest: string | IFindSessionRequest): { created
     }));
 }
 
-function getSessionByCreatorID(creatorId: string): ISession | undefined {
-    return sessions.find(session => session.creatorId === creatorId);
+function getSessionByCreatorID(creatorId: string | Types.ObjectId): ISession | undefined {
+    return sessions.find(session => session.creatorId.equals(creatorId));
 }
 
-function getNewSessionID(): string {
-    const characters = "0123456789abcdef";
-    const maxAttempts = 100;
-    let sessionId = "";
-
-    for (let attempt = 0; attempt < maxAttempts; attempt++) {
-        sessionId = "64";
-        for (let i = 0; i < 22; i++) {
-            const randomIndex = Math.floor(Math.random() * characters.length);
-            sessionId += characters[randomIndex];
-        }
-
-        if (!sessions.some(session => session.sessionId === sessionId)) {
-            return sessionId;
-        }
-    }
-
-    throw new Error("Failed to generate a unique session ID");
-}
-
-function updateSession(sessionId: string, sessionData: string): boolean {
-    const session = sessions.find(session => session.sessionId === sessionId);
+function updateSession(sessionId: string | Types.ObjectId, sessionData: string): boolean {
+    const session = sessions.find(session => session.sessionId.equals(sessionId));
     if (!session) return false;
     try {
-        Object.assign(session, JSON.parse(sessionData));
+        Object.assign(session, JSONParse(sessionData));
         return true;
     } catch (error) {
         console.error("Invalid JSON string for session update.");
@@ -115,8 +99,8 @@ function updateSession(sessionId: string, sessionData: string): boolean {
     }
 }
 
-function deleteSession(sessionId: string): boolean {
-    const index = sessions.findIndex(session => session.sessionId === sessionId);
+function deleteSession(sessionId: string | Types.ObjectId): boolean {
+    const index = sessions.findIndex(session => session.sessionId.equals(sessionId));
     if (index !== -1) {
         sessions.splice(index, 1);
         return true;
@@ -129,7 +113,6 @@ export {
     getAllSessions,
     getSessionByID,
     getSessionByCreatorID,
-    getNewSessionID,
     updateSession,
     deleteSession,
     getSession
diff --git a/src/models/guildModel.ts b/src/models/guildModel.ts
index 15a4c5a6..c393a38d 100644
--- a/src/models/guildModel.ts
+++ b/src/models/guildModel.ts
@@ -13,7 +13,8 @@ import {
     IDojoLeaderboardEntry,
     IGuildAdDatabase,
     IAllianceDatabase,
-    IAllianceMemberDatabase
+    IAllianceMemberDatabase,
+    GuildPermission
 } from "@/src/types/guildTypes";
 import { Document, Model, model, Schema, Types } from "mongoose";
 import { fusionTreasuresSchema, typeCountSchema } from "./inventoryModels/inventoryModel";
@@ -108,31 +109,31 @@ const defaultRanks: IGuildRank[] = [
     },
     {
         Name: "/Lotus/Language/Game/Rank_General",
-        Permissions: 4318
+        Permissions: GuildPermission.Host | 4318
     },
     {
         Name: "/Lotus/Language/Game/Rank_Officer",
-        Permissions: 4314
+        Permissions: GuildPermission.Host | 4314
     },
     {
         Name: "/Lotus/Language/Game/Rank_Leader",
-        Permissions: 4106
+        Permissions: GuildPermission.Host | 4106
     },
     {
         Name: "/Lotus/Language/Game/Rank_Sage",
-        Permissions: 4304
+        Permissions: GuildPermission.Host | 4304
     },
     {
         Name: "/Lotus/Language/Game/Rank_Soldier",
-        Permissions: 4098
+        Permissions: GuildPermission.Host | 4098
     },
     {
         Name: "/Lotus/Language/Game/Rank_Initiate",
-        Permissions: 4096
+        Permissions: GuildPermission.Host | GuildPermission.Fabricator
     },
     {
         Name: "/Lotus/Language/Game/Rank_Utility",
-        Permissions: 4096
+        Permissions: GuildPermission.Host | GuildPermission.Fabricator
     }
 ];
 
diff --git a/src/services/friendService.ts b/src/services/friendService.ts
index 6243f93b..7affefec 100644
--- a/src/services/friendService.ts
+++ b/src/services/friendService.ts
@@ -4,16 +4,16 @@ import { config } from "./configService";
 import { Account } from "../models/loginModel";
 import { Types } from "mongoose";
 import { Friendship } from "../models/friendModel";
-import { toMongoDate } from "../helpers/inventoryHelpers";
+import { fromOid, toMongoDate } from "../helpers/inventoryHelpers";
 
 export const addAccountDataToFriendInfo = async (info: IFriendInfo): Promise<void> => {
-    const account = (await Account.findById(info._id.$oid, "DisplayName LastLogin"))!;
+    const account = (await Account.findById(fromOid(info._id), "DisplayName LastLogin"))!;
     info.DisplayName = account.DisplayName;
     info.LastLogin = toMongoDate(account.LastLogin);
 };
 
 export const addInventoryDataToFriendInfo = async (info: IFriendInfo): Promise<void> => {
-    const inventory = await getInventory(info._id.$oid, "PlayerLevel ActiveAvatarImageType");
+    const inventory = await getInventory(fromOid(info._id), "PlayerLevel ActiveAvatarImageType");
     info.PlayerLevel = config.spoofMasteryRank == -1 ? inventory.PlayerLevel : config.spoofMasteryRank;
     info.ActiveAvatarImageType = inventory.ActiveAvatarImageType;
 };
diff --git a/src/services/guildService.ts b/src/services/guildService.ts
index 0d8999aa..5486c17f 100644
--- a/src/services/guildService.ts
+++ b/src/services/guildService.ts
@@ -1,5 +1,5 @@
 import { Request } from "express";
-import { getAccountIdForRequest } from "@/src/services/loginService";
+import { getAccountIdForRequest, TAccountDocument } from "@/src/services/loginService";
 import { addLevelKeys, addRecipes, combineInventoryChanges, getInventory } from "@/src/services/inventoryService";
 import { Alliance, AllianceMember, Guild, GuildAd, GuildMember, TGuildDatabaseDocument } from "@/src/models/guildModel";
 import { TInventoryDatabaseDocument } from "@/src/models/inventoryModels/inventoryModel";
@@ -19,7 +19,7 @@ import {
     IGuildVault,
     ITechProjectDatabase
 } from "@/src/types/guildTypes";
-import { toMongoDate, toOid } from "@/src/helpers/inventoryHelpers";
+import { toMongoDate, toOid, toOid2 } from "@/src/helpers/inventoryHelpers";
 import { Types } from "mongoose";
 import { ExportDojoRecipes, ExportResources, IDojoBuild, IDojoResearch } from "warframe-public-export-plus";
 import { logger } from "../utils/logger";
@@ -54,7 +54,10 @@ export const getGuildForRequestEx = async (
     return guild;
 };
 
-export const getGuildClient = async (guild: TGuildDatabaseDocument, accountId: string): Promise<IGuildClient> => {
+export const getGuildClient = async (
+    guild: TGuildDatabaseDocument,
+    account: TAccountDocument
+): Promise<IGuildClient> => {
     const guildMembers = await GuildMember.find({ guildId: guild._id });
 
     const members: IGuildMemberClient[] = [];
@@ -62,13 +65,13 @@ export const getGuildClient = async (guild: TGuildDatabaseDocument, accountId: s
     const dataFillInPromises: Promise<void>[] = [];
     for (const guildMember of guildMembers) {
         const member: IGuildMemberClient = {
-            _id: toOid(guildMember.accountId),
+            _id: toOid2(guildMember.accountId, account.BuildLabel),
             Rank: guildMember.rank,
             Status: guildMember.status,
             Note: guildMember.RequestMsg,
             RequestExpiry: guildMember.RequestExpiry ? toMongoDate(guildMember.RequestExpiry) : undefined
         };
-        if (guildMember.accountId.equals(accountId)) {
+        if (guildMember.accountId.equals(account._id)) {
             missingEntry = false;
         } else {
             dataFillInPromises.push(addAccountDataToFriendInfo(member));
@@ -79,13 +82,13 @@ export const getGuildClient = async (guild: TGuildDatabaseDocument, accountId: s
     if (missingEntry) {
         // Handle clans created prior to creation of the GuildMember model.
         await GuildMember.insertOne({
-            accountId: accountId,
+            accountId: account._id,
             guildId: guild._id,
             status: 0,
             rank: 0
         });
         members.push({
-            _id: { $oid: accountId },
+            _id: toOid2(account._id, account.BuildLabel),
             Status: 0,
             Rank: 0
         });
@@ -94,7 +97,7 @@ export const getGuildClient = async (guild: TGuildDatabaseDocument, accountId: s
     await Promise.all(dataFillInPromises);
 
     return {
-        _id: toOid(guild._id),
+        _id: toOid2(guild._id, account.BuildLabel),
         Name: guild.Name,
         MOTD: guild.MOTD,
         LongMOTD: guild.LongMOTD,
@@ -106,11 +109,11 @@ export const getGuildClient = async (guild: TGuildDatabaseDocument, accountId: s
         ActiveDojoColorResearch: guild.ActiveDojoColorResearch,
         Class: guild.Class,
         XP: guild.XP,
-        IsContributor: !!guild.CeremonyContributors?.find(x => x.equals(accountId)),
+        IsContributor: !!guild.CeremonyContributors?.find(x => x.equals(account._id)),
         NumContributors: guild.CeremonyContributors?.length ?? 0,
         CeremonyResetDate: guild.CeremonyResetDate ? toMongoDate(guild.CeremonyResetDate) : undefined,
         AutoContributeFromVault: guild.AutoContributeFromVault,
-        AllianceId: guild.AllianceId ? toOid(guild.AllianceId) : undefined
+        AllianceId: guild.AllianceId ? toOid2(guild.AllianceId, account.BuildLabel) : undefined
     };
 };
 
@@ -130,10 +133,11 @@ export const getGuildVault = (guild: TGuildDatabaseDocument): IGuildVault => {
 export const getDojoClient = async (
     guild: TGuildDatabaseDocument,
     status: number,
-    componentId?: Types.ObjectId | string
+    componentId?: Types.ObjectId | string,
+    buildLabel?: string
 ): Promise<IDojoClient> => {
     const dojo: IDojoClient = {
-        _id: { $oid: guild._id.toString() },
+        _id: toOid2(guild._id, buildLabel),
         Name: guild.Name,
         Tier: guild.Tier,
         GuildEmblem: guild.Emblem,
@@ -155,8 +159,8 @@ export const getDojoClient = async (
     for (const dojoComponent of guild.DojoComponents) {
         if (!componentId || dojoComponent._id.equals(componentId)) {
             const clientComponent: IDojoComponentClient = {
-                id: toOid(dojoComponent._id),
-                SortId: toOid(dojoComponent.SortId ?? dojoComponent._id), // always providing a SortId so decos don't need repositioning to reparent
+                id: toOid2(dojoComponent._id, buildLabel),
+                SortId: toOid2(dojoComponent.SortId ?? dojoComponent._id, buildLabel), // always providing a SortId so decos don't need repositioning to reparent
                 pf: dojoComponent.pf,
                 ppf: dojoComponent.ppf,
                 Name: dojoComponent.Name,
@@ -165,7 +169,7 @@ export const getDojoClient = async (
                 Settings: dojoComponent.Settings
             };
             if (dojoComponent.pi) {
-                clientComponent.pi = toOid(dojoComponent.pi);
+                clientComponent.pi = toOid2(dojoComponent.pi, buildLabel);
                 clientComponent.op = dojoComponent.op!;
                 clientComponent.pp = dojoComponent.pp!;
             }
@@ -221,7 +225,7 @@ export const getDojoClient = async (
                 clientComponent.Decos = [];
                 for (const deco of dojoComponent.Decos) {
                     const clientDeco: IDojoDecoClient = {
-                        id: toOid(deco._id),
+                        id: toOid2(deco._id, buildLabel),
                         Type: deco.Type,
                         Pos: deco.Pos,
                         Rot: deco.Rot,
diff --git a/src/types/friendTypes.ts b/src/types/friendTypes.ts
index 24c2f9d7..f4799201 100644
--- a/src/types/friendTypes.ts
+++ b/src/types/friendTypes.ts
@@ -1,8 +1,8 @@
 import { Types } from "mongoose";
-import { IMongoDate, IOid } from "./commonTypes";
+import { IMongoDate, IOidWithLegacySupport } from "./commonTypes";
 
 export interface IFriendInfo {
-    _id: IOid;
+    _id: IOidWithLegacySupport;
     DisplayName?: string;
     PlatformNames?: string[];
     PlatformAccountId?: string;
diff --git a/src/types/guildTypes.ts b/src/types/guildTypes.ts
index 5f5ba8f8..7913c5fe 100644
--- a/src/types/guildTypes.ts
+++ b/src/types/guildTypes.ts
@@ -1,11 +1,11 @@
 import { Types } from "mongoose";
-import { IOid, IMongoDate } from "@/src/types/commonTypes";
+import { IOid, IMongoDate, IOidWithLegacySupport } from "@/src/types/commonTypes";
 import { IFusionTreasure, IMiscItem, ITypeCount } from "@/src/types/inventoryTypes/inventoryTypes";
 import { IPictureFrameInfo } from "./shipTypes";
 import { IFriendInfo } from "./friendTypes";
 
 export interface IGuildClient {
-    _id: IOid;
+    _id: IOidWithLegacySupport;
     Name: string;
     MOTD: string;
     LongMOTD?: ILongMOTD;
@@ -22,7 +22,7 @@ export interface IGuildClient {
     CeremonyResetDate?: IMongoDate;
     CrossPlatformEnabled?: boolean;
     AutoContributeFromVault?: boolean;
-    AllianceId?: IOid;
+    AllianceId?: IOidWithLegacySupport;
 }
 
 export interface IGuildDatabase {
@@ -71,7 +71,6 @@ export interface ILongMOTD {
     authorGuildName?: string;
 }
 
-// 32 seems to be reserved
 export enum GuildPermission {
     Ruler = 1, // Clan: Change hierarchy. Alliance (Creator only): Kick clans.
     Advertiser = 8192,
@@ -79,6 +78,7 @@ export enum GuildPermission {
     Regulator = 4, // Kick members
     Promoter = 8, // Clan: Promote and demote members. Alliance (Creator only): Change clan permissions.
     Architect = 16, // Create and destroy rooms
+    Host = 32, // No longer used in modern versions
     Decorator = 1024, // Create and destroy decos
     Treasurer = 64, // Clan: Contribute from vault and edit tax rate. Alliance: Divvy vault.
     Tech = 128, // Queue research
@@ -127,13 +127,13 @@ export interface IGuildVault {
 }
 
 export interface IDojoClient {
-    _id: IOid; // ID of the guild
+    _id: IOidWithLegacySupport; // ID of the guild
     Name: string;
     Tier: number;
     TradeTax?: number;
     FixedContributions: boolean;
     DojoRevision: number;
-    AllianceId?: IOid;
+    AllianceId?: IOidWithLegacySupport;
     Vault?: IGuildVault;
     Class?: number; // Level
     RevisionTime: number;
@@ -148,11 +148,11 @@ export interface IDojoClient {
 }
 
 export interface IDojoComponentClient {
-    id: IOid;
-    SortId?: IOid;
+    id: IOidWithLegacySupport;
+    SortId?: IOidWithLegacySupport;
     pf: string; // Prefab (.level)
     ppf: string;
-    pi?: IOid; // Parent ID. N/A to root.
+    pi?: IOidWithLegacySupport; // Parent ID. N/A to root.
     op?: string; // Name of the door within this room that leads to its parent. N/A to root.
     pp?: string; // Name of the door within the parent that leads to this room. N/A to root.
     Name?: string;
@@ -166,7 +166,7 @@ export interface IDojoComponentClient {
     DestructionTimeRemaining?: number; // old versions
     Decos?: IDojoDecoClient[];
     DecoCapacity?: number;
-    PaintBot?: IOid;
+    PaintBot?: IOidWithLegacySupport;
     PendingColors?: number[];
     Colors?: number[];
     PendingLights?: number[];
@@ -191,7 +191,7 @@ export interface IDojoComponentDatabase
 }
 
 export interface IDojoDecoClient {
-    id: IOid;
+    id: IOidWithLegacySupport;
     Type: string;
     Pos: number[];
     Rot: number[];
@@ -285,7 +285,7 @@ export interface IGuildAdDatabase {
 }
 
 export interface IAllianceClient {
-    _id: IOid;
+    _id: IOidWithLegacySupport;
     Name: string;
     MOTD?: ILongMOTD;
     LongMOTD?: ILongMOTD;
@@ -306,7 +306,7 @@ export interface IAllianceDatabase {
 }
 
 export interface IAllianceMemberClient {
-    _id: IOid;
+    _id: IOidWithLegacySupport;
     Name: string;
     Tier: number;
     Pending: boolean;
@@ -314,7 +314,7 @@ export interface IAllianceMemberClient {
     Permissions: number;
     MemberCount: number;
     ClanLeader?: string;
-    ClanLeaderId?: IOid;
+    ClanLeaderId?: IOidWithLegacySupport;
     OriginalPlatform?: number;
 }
 
diff --git a/src/types/session.ts b/src/types/session.ts
index d7f6e68a..65007172 100644
--- a/src/types/session.ts
+++ b/src/types/session.ts
@@ -1,6 +1,8 @@
+import { Types } from "mongoose";
+
 export interface ISession {
-    sessionId: string;
-    creatorId: string;
+    sessionId: Types.ObjectId;
+    creatorId: Types.ObjectId;
     maxPlayers?: number;
     minPlayers?: number;
     privateSlots?: number;
@@ -18,7 +20,7 @@ export interface ISession {
     customSettings?: string;
     rewardSeed?: number;
     guildId?: string;
-    buildId?: number;
+    buildId?: number | bigint;
     platform?: number;
     xplatform?: boolean;
     freePublic?: number;