tlmgr update --self fails on `latest`

[rwb27]

I've just re-run a build script that uses pandoc/latex:latest and tlmgr update --self failes with the following error:

# tlmgr update --self

/opt/texlive/texdir/bin/default/tlmgr: TLPDB::from_file could not initialize from: ftp://tug.org/historic/systems/texlive/2022/tlnet-final/tlpkg/texlive.tlpdb
/opt/texlive/texdir/bin/default/tlmgr: Maybe the repository setting should be changed.
/opt/texlive/texdir/bin/default/tlmgr: More info: https://tug.org/texlive/acquire.html

It works fine on edge so I'm guessing there is something that's gone out of date? Sorry if this is something that's obvious already, but I wasn't quite sure what to do beyond the self-update command.