The data of member property (vrt_member@UCIUser) was not transferred

We have a SCIM connector where the user-membership is on the /User schema and for the handling of memberships we are using the virtual property vrt_member (Members of M:N schema types) that refers the table UCIUserHasGroup. In the virtual property, the checkbox "Enable relative complement handling (required for member rules)" is not checked. When we check it, we receive the error message "Object matching rule (vrt_member <-> value) from the system map (User) uses schema properties with a different data type. If you apply this rule, an error will occur.  Solution   Disable the option "Enable relative complement handling" on the virtual property (UCIUser.vrt_member)."

All operations regarding user membership work when we don't have this checkbox enabled. For instance, adding 2 groups to the user account and removing 1 group from the user account. However, we receive the error message when an employee loses the account definition and One Identity tries to remove the user-membership. 

Process that fails: UCI_User_Update

Error: [2134028] The data of member property (vrt_member@UCIUser) was not transferred. Possible reasons are configuration issues or an invalid object state

I have tried to change the condition of the mapping, but in all possible scenarios, the error message still occurs. For us, this message seems like a false-alarm and we noticed that even when ignoring the message, the functionality of removal of user-membership in the SCIM API Target System seems to work.

 

Does anyone have an idea on how to minimize this error?