I deleted the yaml files that were generated in /opt/librenms/includes/definitions/discovery. However that alone didn’t put things back it seemed. I then found the same yaml files in the includes/definitions/os folder. Basically just did a find for anything on the system with the new OS names I tried to generate. Deleted these, and re-ran the discovery. My inventory is now back to “normal” but I still don’t know how to go about adding these new OS/MIBs?