If you use the Add new reference option on the Incident Process View page instead of Manage Related Configuration Items you can create non-CMDB based references for an incident. However when you then use the Manage Related Configuration Items process type action to add CMDB based references an error is generated.
Application Name : SD.AssetViewProject
The SD.AssetViewProject wasn't designed to handle non-CMDB based references.
Symantec Development has created a point fix for this issue. The point fix for this issue and all other point fixes for ServiceDesk 7.5 SP1 can be found in TECH212326.
ServiceDesk 7.5 Service Pack 1