android migration_error ai_generated true

IllegalStateException: Room migration missing

ID: android/room-migration-error

Also available as: JSON · Markdown
82%Fix Rate
86%Confidence
3Evidence
2023-01-01First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
14 active — — —

Root Cause

Room database version changed without providing migration.

generic

Workarounds

  1. 90% success Write Migration(fromVersion, toVersion) with ALTER TABLE statements
  2. 88% success Use auto-migration: @AutoMigration(from=1, to=2) for simple changes

Dead Ends

Common approaches that don't work:

  1. Use fallbackToDestructiveMigration() always 82% fail

    Loses user data on every schema change

  2. Keep database version at 1 forever 88% fail

    Cannot change schema