diff --git a/src/models/guildModel.ts b/src/models/guildModel.ts
index fa880997..cf2d1d07 100644
--- a/src/models/guildModel.ts
+++ b/src/models/guildModel.ts
@@ -239,7 +239,7 @@ const guildAdSchema = new Schema<IGuildAdDatabase>({
     Tier: { type: Number, required: true }
 });
 
-guildAdSchema.index({ guildId: 1 }, { unique: true });
+guildAdSchema.index({ GuildId: 1 }, { unique: true });
 guildAdSchema.index({ Expiry: 1 }, { expireAfterSeconds: 0 });
 
 export const GuildAd = model<IGuildAdDatabase>("GuildAd", guildAdSchema);