We have a conference that we setup and tested with the leader/admin PIN. That initial call was hung up (two weeks ago) but the conference still shows that it has a participant in FOP2. I called in and tried to access the conference with a participant PIN but it says the leader is not yet in the conference, so it seems like FreePBX knows that the call FOP2 shows is in it really is not. How can we clear this from FOP2?