34 replies

MongoDB E11000 Duplicate "id" Key Error

I've been encountering this issue since I'm using Discord's OAUTH2 with BetterAuth while using MongoDB as an adapter.

The exact error is as shown:

ERROR [Better Auth]: MongoServerError: E11000 duplicate key error collection: credmaid.webusers index: id_1 dup key: { id: null }

ERROR [Better Auth]: MongoServerError: E11000 duplicate key error collection: credmaid.webusers index: id_1 dup key: { id: null }

I've tried setting

generateId

generateId

to false like:

advanced: {
    database: {
      generateId: false,
    },
    cookiePrefix: "credmaid",
  },

advanced: {
    database: {
      generateId: false,
    },
    cookiePrefix: "credmaid",
  },

What could be the issue?

Solution

it could be that there are already fields in that webusers table with the

id

id

field & it's unique constraint, so even after you updated the mongoose schema it doesn't reflect mongo

Better Auth•4mo ago•