This is a follow up of T5697. While viewing circular certificates works, deleting them reliably causes a crash of Kleopatra.
How to reproduce:
Take the test certificates from rGc9343bec83e2c2a14b564b8a13998806eab1ae9f and import them in Kleopatra.
Right-click on one of them -> delete
Kleopatra will crash after a second or so. Starting it again shows that the certificates are still there.