Is it ok to delete game tickets ?

If you delete tickets for games you use, they will stop working. While it is ok to delete tickets of games that you don't need anymore, one question has to be raised: why? They don't take up any amount of space nor would it have any other advantage to delete them besides catering for your OCD. Just leave that section alone. The mere fact that you have to ask this shows that you might make more damage by deleting content from there than it would bring you any benefit to do so.

 

This will not solve your problem. Updating your CFW might, as already pointed out in the other thread you made about SSBU.

 

Tickets are used to launch your games so removing those will make the issue worse. If the game is giving you issues after updating, then it might be mods causing the problem.