Unshare leaves entries with "None" as Role

[enribar]

Hi, when I unshare a previously shared mailbox using mailbox toolkit, some traces remain in the sharer preferences > sharing menu: there are some entries regarding the shared folders with "None" as Role:

Is there a way to automatically clean up those lines?

Zimbra version: Release 8.8.15.GA.4179.UBUNTU20.64 UBUNTU20_64 FOSS edition, Patch 8.8.15_P37

Thank you in advance.