## The problem
Issue prisma/orm#28573 (closed, 73 comments): When upgrading to the latest version of prisma, i am getting issues with the config file saying engine:'classic' engine doesnt exist, then on project build i am getting an error saying the url in the db source block is deprecated but when removing it i get and error saying it is required to be added. [image] `npx prisma generate Loaded Prisma config from prisma.config.ts. Prisma schema loaded from prisma\schema.prisma Error: Prisma schema validation - (get-config wasm) Error code: P1012 error: The datasource property `url` is no longer supported in schema files.
## What to do
[nonacc / otsairaze (commenters)]: Prisma 7 moved config out of schema.prisma into prisma.config.ts, which breaks two things. (1) Seeding fails with "Cannot read properties of undefined (__internal)" because Prisma 7 no longer auto-detects the database provider: add an explicit adapter in prisma.config.ts. (2) In Docker multi-stage builds, make sure prisma.config.ts is copied into the final image, or migrate deploy fails with "The datasource property is required in your Prisma config file".