Disconnected participants after updating to CPS22, PDM Link10.2 M020

After a successful patch of CPS22 from CPS2. I received emails saying that I had several participants that were disconnected from LDAP. I have read the article on how to search for disconnected participants and either delete them if they are no longer used or add them back into LDAP, but my question is do I need them?

I don't recognize these License users, can anyone provide some insight please?

Here is the list.

PTC Author License

PTC Bom Transformation License

PTC Contributor License

PTC EBOM Management License

PTC Ip protection license

PTC Manufacturing License

PTC Mechanical Design I License

PTC Mechanical Design II License

PTC Project Management License

PTC QUality License