Fix User Server Principal authentication error after db restore

use database_name;
— ALTER DATABASE database_name SET READ_WRITE

——– Reset SQL user account guids ———————
DECLARE @UserName nvarchar(255)
DECLARE orphanuser_cur cursor for
SELECT UserName = su.name
FROM sysusers su
JOIN sys.server_principals sp ON sp.name = su.name
WHERE issqluser = 1 AND
(su.sid IS NOT NULL AND su.sid <> 0x0) AND
suser_sname(su.sid) is null
ORDER BY su.name

OPEN orphanuser_cur
FETCH NEXT FROM orphanuser_cur INTO @UserName

WHILE (@@fetch_status = 0)
BEGIN
–PRINT @UserName + ‘ user name being resynced’
exec sp_change_users_login ‘Update_one’, @UserName, @UserName
FETCH NEXT FROM orphanuser_cur INTO @UserName
END

CLOSE orphanuser_cur
DEALLOCATE orphanuser_cur