/prom/push http status 400 bad request err:outofbounds

I have two physical ubuntu servers behind one IP, one connects to Grafana Cloud via the agent like a champ and the other throws an error:

err="server returned HTTP status 400 Bad Request: user=XXXXXX: err:outofbounds

Where would be the best place to start to fix this issue?

Hi, here are the ingest errors we know about:

Just checking a hypothesis, are you sending metrics older than 12 hours?