Vendor showing as unknown for some devices but working for others by the same vendor

AnnD

I did a discover on my network after adding new equipment.  Our racks and PDUs are from American Power Conversion.  We have racks and PDUS.  After discovery, I have several that worked but the majority are unknown.  For machine Type, several came over as APC but a lot of them are showing as masterSwitchrPDU2. 

I a on Orion Platform HF4, NCM HF1 2020.2.6

Is there a way I can edit these?  preferably by bulk 

Thank you 

monitoringlife

Have you confirmed they got added via SNMP and not as ICMP/Ping only? 

I had a few UPS's that did something similar years ago and I think it was because they were using whitelabel motherboards (few vendors used the same components, so we had some issues with discovery/vendor labels.)