Searching for the following OID using the discovery rule.

SNMPv2 agent ".1.3.6.1.2.1.1.1.0"
SNMPv2 agent ".1.3.6.1.2.1.1.5.0"
SNMPv2 agent ".1.3.6.1.2.1.47.1.1.1.1.13.1"
SNMPv2 agent ".1.3.6.1.2.1.47.1.1.1.1.13.1001"

①When the criterion for identifying the uniqueness of a device was set to sysname (.1.3.6.1.2.1.1.5.0),the only value that could be obtained was sysname (.1.3.6.1.2.1.1.5.0).
 

②When the criterion for identifying the uniqueness of the device was set to the IP address,
 values could be obtained for all OIDs.

In case ①, I don't understand why values other than sysname(.1.3.6.1.2.1.1.5.0) cannot be retrieved.