HIG-0064 Value already exists
This issue is resolved in Network Manager 126.96.36.199 fix 16.
On saving PEM the error message appears "HIG-0064 Value already exists". Now it will not allow saving changes.
Close this box by pressing OK button and go to HELP>Display Error in top menu. The real error is: "ORA-00001: unique constraint (xxx.DHI_PK) violated"
Open Alert setup form (HIG1520) and query back all entries created for Enquiries. To avoid this error there must be only one recipient in Mail set up tab. Please check this and correct.