Steps to reproduce:
- Create full clone of v2 template, eg Template Module Generic SNMPv3
- Select one or more SNMPv2 items on new template
- Mass update, change type to v3 and configure all v3 parameters as required
"Cannot update items: No SNMP OID specified". There isn't even an OID field in the mass update screen anyway!
Selected items would be changed from v2 to v3.