I have a table that stores some extra data for some rows of a table like:
public class QuoteExtra { [Key] public int QuoteId { get; set; } // Mor
I could'nt solve this Problem with your Hints then i've tried to re-create the whole Database but it wasnt working, too.
To fix this you have to remove the identity: true property on the first(!) creation of the Column (e.g. Initial-Migration).
Maybe it will help someone..