Prisma 6 Migration Troubleshooting

Issue: Type error on Bytes field

Error:

Type 'Buffer' is not assignable to type 'Uint8Array'

Solution: Replace Buffer operations with TextEncoder/TextDecoder or use Uint8Array directly.

Error:

ERROR: duplicate key value violates unique constraint "_CategoryToPost_AB_unique"

Solution: Implicit m-n tables may have duplicate entries. Clean data before migration:

DELETE FROM "_CategoryToPost" a USING "_CategoryToPost" b
WHERE a.ctid < b.ctid AND a."A" = b."A" AND a."B" = b."B";

Error:

Module '"@prisma/client"' has no exported member 'NotFoundError'

Solution: Remove NotFoundError import, use P2025 error code checking instead.

Error:

'async' is a reserved word

Solution: Rename field in schema with @map() to preserve database column name.