How to migrate data directory / rootless_storage_path?

[muety]

Currently, my /etc/containers/storage.conf looks like this:

# ...
runroot = "/run/containers/storage"
graphroot = "/var/lib/containers/storage"
rootless_storage_path = "/var/containers/$USER"
# ...

However, due to storage space limitations, I want to move all user data from /var/containers/$USER to /data/containers/$USER instead, possibly without losing containers or images.

Simply moving all data and then changing the config paths unsurprisingly doesn't seem to work, because paths seem to be hard-coded in /var/lib/containers/storage/db.sql and / or /var/containers/$USER/db.sql.

A similar issue was discussed in #18780, however, the approach mentioned (copy volumes, run podman system reset, change config paths) doesn't take containers into account. Simply copying all data instead yields the following error, for obvious reasons:

Error: database static dir "" does not match our static dir "/data/containers/ferdinand/libpod": database configuration mismatch

So my question is: is there a way to migrate the storage location without losing data? Would be happy to get some help on this!

Using Podman 4.9.3 on Ubuntu 24.04.