SQL Server resetuj tożsamość
DBCC CHECKIDENT ('table name', RESEED , 0)
CustomMadeMan
DBCC CHECKIDENT ('table name', RESEED , 0)DBCC CHECKIDENT ('YourTableName', RESEED, 1)
USE <databasename>;
GO
DBCC CHECKIDENT ('<tablename>.<columnname>', <value>, <incrementby>);
GO