Hi uisanata,
It is not possible to migrate a BIMcloud Basic to one version from another. Once you locked it to a certain version, it stays like this (except if you upgrade to full BIMcloud).
In your case, a new installation is needed and projects should be migrated either manually (re-share PLN-s to the new setup with ARCHICAD 23) or through the Migrate Teamwork option (similar to the first, maybe a bit more complex, so I suggest the first option).
Kind regards,
Noémi Balogh
Community Expert, Admin