Finally I converted my internal sever to Bastille as jail manager. (I was using iocage). (https://bastillebsd.org)
To completely remove all stuff from iocage, you can run the following command:
iocage clean -a
Then delete the package
pkg delete py38-iocage
Iocage thank you for managing my jails for many year!
(I'm still using you on several other servers)