A new mapping was added to the sync project. However the new mapping is observed to cause a warning error in the Multi-reference mapping rules in other mappings (e.g. Group and GroupOfNames mapping).
Running a sync will also result in the following error:
" Error executing synchronization step (Group)!
 The mapping rule (vrtMember_member) was unable to execute synchronization between system objects (ServiceDesk) and (ServiceDesk) successfully!
 No matching member system object for the other target system side could be created for the following objects system objects: TestUser"
The newly added mapping maps to a schema class on the target system (LDAP)
This schema class is derived from a schema type which is also an included member of the Multi-reference mapping rule in other mappings (e.g. Group and GroupOfNames mapping).
The reason for the error is because “Maps objects referenced by multiple references" option for the new mapping is not set (unchecked).
Set/Check the “Maps objects referenced by multiple references" option for the new mapping.