This issue is about updating the pinned CAs in tails.git, so Tails 4.15 and newer have a working upgrader once the new certificate is put back in place. The upgrader should support both the old and new CAs for now, to allow a seamless transition. The sysadmin part of it, to workaround this problem on Tails 4.14 and earlier (for a month, which is the best we can do), is tails/sysadmin#17791. Incidentally, this problem breaks most of our test suite. - [x] Remove the note on /doc/upgrade/error/check. - [x] Remove the note on /home.