You may only update LdapSystemObjectData instances with SearchResultEntries having the same object class

ErrorMessages (2021-10-20 20:43:23.123) [1777018] Error executing synchronization project (LDAP)'s workflow (Provisioning).
[1777124] Error executing projection step (Groups) of projection configuration (Provisioning (92a34f5a-0a7f-439d-ac12-4c2807897fe5)).
[1777219] Error executing synchronization step (Groups)!
[1777028] Error loading a system object using its prototype (*****)!
[System.ArgumentException] You may only update LdapSystemObjectData instances with SearchResultEntries having the same object class

I am not sure what does this mean -- You may only update LdapSystemObjectData instances with SearchResultEntries having the same object class?