This bug was fixed in the package libcanberra - 0.30-17ubuntu2
---
libcanberra (0.30-17ubuntu2) plucky; urgency=medium
* Introduce a transitional libcanberra-gtk3-0t64 package to ensure users
are upgraded to the correct libcanberra-gtk3-0 package (LP: #2099829)
-- Julian Andre
** Description changed:
[Impact]
People upgrading from noble are stuck on the no-longer-available
libcanberra-gtk3-0t64 (which has been changed back to libcanberra-gtk3-0 in
oracular).
This is in turn causes them to have an unsupported package installed,
and the new apt solver is prod
