I believe that this was the problem, the timeout was occurring due to the distance between the PBSs, the main one is in Brazil and the Backup one is in Canada, almost 200ms apart and perhaps during peak link usage times, this latency was even...
you don't need to delete anything, just restart the sync (it will still make progress unless you run GC).
the timeout points at a network problem though, maybe something is throttling http2 connections?
It seems that I have solved it here, for some reason my PBS was closing connections when it was taking too long, I ended up solving it by doing the following tuning on my Debian/PBS.
I edited the /etc/sysctl.conf file and added the following...
Hello everyone! I have a PBS running locally on my client and a PBS running on OVH to receive a copy of the data from the local PBS.
In this environment I currently have 8 VMs, of the 8 machines 7 are smaller than the PBS and can push the VMs...