The IPAM uses the SNMP credentials as “ordered” list and try to connect to device on monitored IP address. If first fails to connect then try second one, etc..
Therefore it is expected that users will set all credentials and possible combinations of types of SNMP credentials in desired order (in your case v2 before v1) to cover as much devices in network as possible.
In your case it is right to have two SMP credentials.
It is best practicee to order them by number of devices in network (to prevent lot of fail tests).
NOTE: Once the SNMP credential success for particular IP address, it is stored into data storage …
Next scan will then re-use stored SNMP credential before all other credentials, to reduce network traffic.
IPAM Dev Team