Downgrading from SNMP v3 to v2c

I have a set of gear that we're testing a SNMP v2c conversion against and I was previously running SNMP v3 against. LM does not seem to recognize the change even though I've attempted to change snmp.version to v2c and ensured that snmp.community is proper and in place.

I have added a blank snmp.security entry as it is in a device group that has it defined for other hosts that still support SNMP v3.

Any suggestions?