We don't have any context when reading the logs (query and status code) be that gunicorn-swh-deposit.service logs or at the end of the line in kibana.
That makes investigation hard to debug.

An actionable action: just adding the "reason" (when error code in {4xx,5xx}) would be a sufficient step forward to close this.

I have started to look into that but i don't currently get what's the needed change (deposit code, django, gunicorn, apache, ...)...