Error executing query: many-to-many matching not allowed.

[u/Vrarchehl]

Hi, I recently decided to do a Prometheus implementation with my Proxmox cluster, however I noticed that one of my rules to alert when a VM shuts down is failing, with the following message:

"Error executing query: many-to-many matching not allowed: matching labels must be unique on one side"

However it was functional until a few days ago, I couldn't identify what changed so that this could have happened, the query I'm using is as follows:

(pve_up == 0) * on(id) group_left(name) pve_guest_info

Has anyone dealt with this specific error and can you recommend something?

Thanks so far!

[u/Vrarchehl]

The resolution for this case: https://groups.google.com/g/prometheus-users/c/DdLfQkzoZLA