ex: https://musicbrainz.org/series/b36465ff-a626-43fe-a6d0-b162e2e8fdcd

Initially I was able to add 60 entities or more at the same time (- add 60 Recordings then click Enter Edit)

Then it started to fail if adding more then 20 entities

Now it always end up is an server Sleepy/Timeout even with just 10 entities.

I suppose it's related of the number of entities already existing (~2000)