I'm planning an upgrade of my server using this tutorial, but I think I need answers to the following questions before I can try: Am I correct in thinking that I need to upgrade ISPConfig from 3.1 to 3.2 BEFORE I upgrade the OS from Ubuntu 18.04 LTS to 20.04 LTS? Regarding my Let's Encrypt configuration, I previously followed this tutorial (to the letter I think). The upgrade tutorial has the following note: Question is, which option would be the safest option (lease chance of customer disruption) for me? For this question: Is there any advantage in having ISPConfig replace the existing Let's encrypt certificate? Thanks in advance.