In simple terms:
1. Professional companies that have been granted the rights to do the Sergel can do the Sorkin instead. (That's quite something.)
2. Amateur companies that have been granted the rights to do the Sergel can still do it.
Still unknown:
1. What do the agreements actually say?
2. Is there any liability for what happened? (Extremely unlikely.)
3. Who is actually at fault? (Hint: it's an estate.)