I tried manually replacing kinetic with lunar in sources.list and then doing the upgrade manually, hoping to see a trivial dependency issue:
1. sed -i 's/kinetic/lunar/' sources.list 2. sudo apt update 3. sudo apt full-upgrade
but this appears to be working (dependencies are resolved and the upgrade starts).
I tried manually replacing kinetic with lunar in sources.list and then doing the upgrade manually, hoping to see a trivial dependency issue:
1. sed -i 's/kinetic/lunar/' sources.list
2. sudo apt update
3. sudo apt full-upgrade
but this appears to be working (dependencies are resolved and the upgrade starts).