mongodb constraint_error ai_generated true

MongoServerError: E11000 duplicate key error

ID: mongodb/duplicate-key-error

Also available as: JSON · Markdown
88%Fix Rate
90%Confidence
3Evidence
2023-01-01First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
7 active — — —

Root Cause

Unique index constraint violated.

generic

Workarounds

  1. 92% success Use upsert (updateOne with upsert:true) for idempotent writes
  2. 88% success Check for _id conflicts in bulk inserts with ordered:false

Dead Ends

Common approaches that don't work:

  1. Drop the unique index 88% fail

    Allows duplicate data, breaks application logic

  2. Catch and silently ignore all E11000 72% fail

    May hide real data issues