I have enabled automatic migrations. Then, I deleted my whole db. Next, i executed Update-database
from command console, and it recreated my db. Then, I started
Detach your local Database say example 'database1.mdf' from visual studio 'server explorer' and then open SQL server management studio right click on Databases > Attach and then browse the same 'database1.mdf' file .If you doesn't have access then copy&past both the mdf and ldf files into c drive and do attach.
Then open new query window on sql server then do copy your identity tables as like below query.
*'select * into [__MigrationHistory] from Database1.dbo.__MigrationHistory '*