Changing from v 6.3 to 7.9.1

Hi, we’re thinking about changing a very old project developed under KS v 6.3 to KS v 7.9.1,
should we expect some kind of problem when running test cases developed under KS v 6.3 in new Katalon Studio v 7.9.1?
will it be necessary to modify old test cases?

Regards.