Package: jwm Version: 2.3.7-5 Tags: bookworm, sid jwm has a dependency on rxvt-unicode-256color, this package has been dropped by the rxvt-unicode source package, it is still present in unstable as a cruft package but is completely gone from testing.
The dependency on rxvt-unicode-256color has several other alternatives, so the package is still installable but nevertheless it is preferable if the first entry in the list is installable. Please consider dropping rxvt-unicode-256color and rxvt-unicode-lite from the list.