Description of problem: Platform BZ for https://issues.jboss.org/browse/JBPM-3830 Steps to Reproduce: 1. Import attached repository_export_simple_dataobject.zip 2. Open 'dataobject' process 3. Save the process 4. Observe 'DataInputSet' and 'Assignments' property of 'Task1' node Actual results: Entries in 'DataInputSet' and 'Assignments' are added every time you save Expected results: Only one entry in 'DataInputSet' and 'Assignments' is added for one DataObject