A PointOnSurfByTwoCoords_AE does not have a related base plate.
A point on surface by two coordinates active entity (AE) does not have a related base plate: Missing the RefSurface relationship to PlateSystem for PointOnSurfByTwoCoords_AE.
What You Should Do
Ask your database administrator to back up the model.
Supply all information possible that may have led to this situation, and submit this information along with the backup to Smart 3D Support.
Delete the object using one of the following methods:
Select the object in the Workspace Explorer, and delete it.
Run the Clean Database custom command to delete the object.