Error while committing a definition set in ITSM 7.x: Could not connect to External Datasource, Validation of definition aborted:
This can be caused by an invalid entry in the Definition set. To correct this Click on Definitions and then External Data Sources. Validate all Data sources in this dialogue are accessible and update/delete as needed. Be aware that deleting a data source may cause other problems if it's needed by customizations in the system.