Right now, the cardinality of these relationship types is set to:

entity0 cardinality: Few relationships (0)
entity1 cardinality: Few relationships (0)

But a single work can have many derived versions, many arrangements, etc.

Changing one side of these relationships (someone has to figure out which one is appropriate for the direction) to "Many relationships" should make the relationship editor and release display page easier to use (at least, if both places respect the cardinality settings).

https://musicbrainz.org/release/96f2f8c7-5c2d-4a28-9587-0fa054236eef is an example where this is problematic.