I had 20 to delete then which was feasible.
As a consequence, I wouldn't invite players - they shall apply.
Now, I consider the "pendings" a kind of garbage created by incomplete programming - unresolved CC invites should disappear after some time but they pile up.
My two Pfennig: Don't bother with this big number as it won't affect your CC. They aren't even visible from outside!
(Ask your CC mates if they see them!)