How many replays are on this volume and where does this one fall in the time scale?  Do you have any recoveries that use this particular replay?  If this is not the oldest (last) replay and you dont have any recoveries you might want to call copilot. There are a few things that can cause a "stuck replay" 
Hi, I have a volume that has a replay which won't coalesce. It is stuck in Expiration Pending state. What can cause this?
Replay stuck in Expiration Pending state