Unfortunately due to some things that happened with the way they renamed packages after the split (from ansible to ansible-core and ansible-base), it required a

Unfortunately due to some things that happened with the way they renamed packages after the split (from ansible to ansible-core and ansible-base), it required a full 'uninstall and reinstall' operation, otherwise Pip gets things a bit confused and the installation breaks completely. There was a Herculean effort to try to get it to just upgrade cleanly, but in the end it turned out there was no way.