Describe the bug
Error while trying to remove checked-in tickets

To Reproduce
Steps to reproduce the behavior:

1. Complete a reservation with one or more tickets
2. Check-in one of the tickets
3. Go to the reservation details
4. Click on "Remove" next to the checked-in tickets

Expected behavior
"Remove" button shouldn't be displayed at all. In any case, we should check if the ticket being removed has a compatible status before doing anything else

Screenshots
none

Desktop (please complete the following information):
All OS, all browsers

Smartphone (please complete the following information):

Additional context
none