A flaw was found in OpenStack. When a user tries to delete a non-existing access rule in it's scope, it deletes other existing access rules which are not associated with any application credentials.
https://review.opendev.org/c/openstack/python-openstackclient/+/888697
https://bugzilla.redhat.com/show_bug.cgi?id=2212960
https://access.redhat.com/security/cve/CVE-2023-6110