help creating a nested serializer using drf

[ola neat]

good day guys, i'm working on a project and i'm creating mulitiple model linked using foriegnKey field but i'm getting a relatedManager object has no attribute id

err

below is the link to my question on slack, hope anyone can help out

https://stackoverflow.com/questions/70928548/how-to-fix-attributeerror-relatedmanager-object-has-no-attribute-id