Hello,
for what I’ve understood the update from the 3.0 to the 3.1 version requires creating new certificates, since the ones created with the script shipped with 3.0 does not use the SAN property. Also the storage-proxy certificate is dropped.
Is this correct or there is something I’ve misunderstood?
I don’t think so but any specific steps between versions should be covered in the upgrading documentation. I don’t see it, but check out your deployment option (e.g. Kubernetes): Server installation | Mender documentation
Also wanted to note that Mender 3.2 is released recently.