Prisma Migration Failed - Schema Mismatch

1. Uncommitted changes in migration history
2. Database schema modified outside of Prisma (manual SQL)
3. Migration file corrupted or contains invalid SQL
4. Trying to add non-nullable column without default value
5. Foreign key constraints preventing schema changes

Check migration status: npx prisma migrate status

Reset database in development (careful!): npx prisma migrate reset

For new non-nullable fields, add with default: @default(uuid()) or @default(now())

Review migrations folder and ensure all files are valid SQL