Attaching an entity of type 'X' failed because another entity of the same type already has the same primary key value

Question

ErrorMessage :

Attaching an entity of type \'FaridCRMData.Models.Customer\' failed because another entity of the same type already has the same prim

Answer 1

I believe you might have invoked Select before the update, By default, DBContext will cache the record when they are fethced (Selected), use "AsNoTracking()" in your select call while fetching record.