Error 403 when trying yo delete a map associated with a team #3494

This bug has been reported in the Framasoft forum (with captures) but I can reproduce on umap.

1. create a map with your account
2. create a team
3. change permissions for the map: associate the map with the team and save
4. delete the map
5. go to your team: the map is here but unavailable and a 403 popup shows up