Nodes are most of the time not unregistered in PBS

If I run azpbs autoscale here is the output, these nodes have been deprovisioned by Cycle and no longer exists.
[root@scheduler hpcadmin]# azpbs autoscale
2021-04-01 09:11:18,334 ERROR: Could not convert private_ip(None) to hostname using gethostbyaddr() for SchedulerNode(254rq000000, 254rq000000, unknown, None): gethostbyaddr() argument 1 must be str, bytes or bytearray, not None
NAME HOSTNAME PBS_STATE JOB_IDS STATE VM_SIZE DISK NGPUS GROUP_ID MACHINETYPE MEM NCPUS NODEARRAY SLOT_TYPE UNGROUPED INSTANCE_ID CTR ITR
254rq000000 254rq000000 down running unknown 20.00gb/20.00gb 0/0 s_v2_pg0 456.00gb 120 unknown hb120rs_v2 false 0.0 0.0
[root@scheduler hpcadmin]#