Ceph

Hello,
we have a CEPH cluster with 17TB of available raw space but it shows pool 100% USED. How can I use this available space?

GLOBAL:
SIZE AVAIL RAW USED %RAW USED
90 TiB 17 TiB 73 TiB 80.86
POOLS:
NAME ID USED %USED MAX AVAIL OBJECTS
.rgw.root 50 5.1 KiB 100.00 0 B 17
fc.rgw.meta 52 15 KiB 100.00 0 B 76
fc.rgw.log 53 12 KiB 100.00 0 B 17877
fc.rgw.buckets.index 57 0 B 0 0 B 1174
fc.rgw.buckets.data 59 41 TiB 100.00 0 B 46242024
fc.rgw.buckets.data.cache 60 0 B 0 0 B 0
fc.rgw.control 61 0 B 0 0 B 8