Shrinkage Active entity without Secondary port.
Shrinkage exists without a Secondary port.
Coding or data model propagation errors.
The Secondary port object will not be seen in a graphic view.
What You Should Do
To delete the object, run the Clean Database custom command (ProgID: SP3DCleanDatabaseCmd.CCheckObj). This command displays a dialog box that lists the objects in error. From the list, you can select the objects and delete them.