How to update the database with dbcontext? -


error: violation of primary key constraint 'pk_dbo.accounts'. cannot insert duplicate key in object 'dbo.accounts'. duplicate key value (62502652-7b60-4a54-a9ad-cfb105d9b821).

   public bool savedata()      {   using (mydbcontext db = new mydbcontext(mysettings.default.localdbcstring))          {             db.database.log = console.writeline;             (int = 0; < needsavelist.count; i++)             {                                    db.flows.addorupdate(needsavelist[i].flow);                                     //   db.accounts.addorupdate(needsavelist[i].flow.accounts);                 //   db.transactions.addorupdate(needsavelist[i].flow.transactions);             }                              db.savechanges();          }         messagebox.show("ok");         return true;      }


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