Entity Framework 4 Error: Unable to update the EntitySet because it has a DefiningQuery

Question

Okay, here\'s the scenario. I have 3 tables. One called aspnet_Users one called Categories and a linking table called User_Categories. aspnet_Users and Categories both ha

Answer 1

Error: Unable to update the EntitySet because it has a DefiningQuery

Twice I got this error, twice I searched for answers everywhere, and in the end my mappings was messed up or the database had no primary key or something. I suggest checking it all out...