Error: “ [1777023] Schema property (vrtobjectClass@site) only accepts data of type (System.String).” (4322106)

After deleting an AD Site in AD, a synchronization throws the following error:

[1777018] Error executing synchronization project (Active Directory Domain (DC=OIM-SIEBENEINS,DC=TD))'s workflow (Initial Synchronization).

[1777124] Error executing projection step (site) of projection configuration (Initial Synchronization (Initial Synchronization)).
[1777219] Error executing synchronization step (site)!
[1777239] The mapping rule (Object class <-> Object-Class) was unable to execute synchronization between system objects (Test-Site-1) and (new object of type site) successfully!
[1777161] Property (vrtobjectClass@site) could not set the value (System.String[]) from system object (new object of type site)!
[1777023] Schema property (vrtobjectClass@site) only accepts data of type (System.String).
The value to write (System.String[]) is however type (System.String[]).

This is a product defect (29837)

WORKAROUND:

Set "Ignore mapping direction restriction on adding" for object class (IM).

Or

Delete the ADSsIte from the Identity Manager database

STATUS:

This will be fixed on a future release of the product. If you require this immediately corrected, please contact support for a hotfix referencing the defect ID 29837.