it doesn't work with me despite i made exactly like documentation....when i make a master it completed good but child it gives me a lot of errors while migration 1- says (Error occurred on DB migration step! Make sure the project is compiled and working. Command output: Build started... Build failed. Use dotnet build to see the errors.) 2- when open the code i found property [ public Guid OrderId ] twice ???? why ???? 3- In folder orderDbSet it gives me an error with namespace