Entity Framework Code First - Defining Relationships/Keys?

This is exception caused by SQL server when you have multiple paths of cascade deletes. If you delete your PaymentTerm it will trigger cascade delete on all three relations. This will blow up when creating either SalesOrder or Invoice .

EF creates by default all one-to-many relations with ON DELETE CASCADE you can remap your specific relation to not use it by.

Read this, I am sure this will help you find the answer.

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