Hi Jean,
You can set the deletion flag at the pooled space level, the flag will automatically get set for the rental spaces belonging to that pooled space.
If you want to discontinue the use of the rental space you can set the valid to date of the rental space to the -1 date from the date you want to make the space available.
Also if there is a valid contract created for a rental space then the deletion flag at the pooled space cannot be set
Hope this helps.
Best Regards,
Hardik Sharma