User Account Mismatch
The owner of your database on the old server was some Windows account that does not exists as login on the new server (if it existed, its login sid would match user sid as it's Windows account, so it's Windows sid).

To fix it you can make sa the owner of your database:

alter authorization on database::YourDBName to sa


Or any other login (I just don't see other logins on your picture that are not certificate logins)