Run DBValidator and check if it fails then nothing much we can do.This was a very common issue back then especially with Embedded Database.
This was fixed in MR3
"Failed to export to Group" when exporting installation packages
Fix ID: 1282747
Fixed in MR2MP2
After migrating to Symantec Endpoint Protection Manager MR2, unable to export MR2 client install packages
Fix ID: 1265816