Why not back up and restore?

>>I use Red Gate SQL Data Compare to duplicate my production data to a testing database. Basically it's a DELETE followed by a bunch of INSERTs. However, it seems to not reset the identity Primary key. I keep getting this error:

{"Violation of PRIMARY KEY constraint 'Primary key_ApplicationNote'. Cannot insert duplicate key in object 'PreApplication.ApplicationNote'.\r\nThe statement has been terminated."}

I know I can go in and run a script to reset the identity, but I have to do that on every table every time I do this. Does anybody know of a way to avoid this? Or a global way to reset all identity columns?