More then likely the software release information isn't being added to the database due to a conflict with an existing entry in the database with the same name.
1. Open log viewer and have it filter on aexconfig.
2. Run a configure of Inventory Solution using aexconfig. Aexconfig is found in the Notification Server\Bin folder. The default command would be aexconfig /configure "c:\program files\altiris\Inventory\config\Inventory.config"
3. Monitor the logs for any errors, specificaly ones pertaining to not being able to add an item to the database. This error will provide you with the GUID of the existing entry that is causing the problem.
4. Open Resource Manager and specify the GUID in the address bar and hit Enter.
5. Choose the Delete Right-click action.
6. Run another configure of Inventory Solution.