how calico release old container cni ip?

[dyrnq]

calicoctl ipam check
Checking IPAM for inconsistencies...

Loading all IPAM blocks...
Found 3 IPAM blocks.
 IPAM block 10.244.126.0/24 affinity=host:vm4:
 IPAM block 10.244.28.0/24 affinity=host:vm6:
 IPAM block 10.244.55.0/24 affinity=host:vm5:
IPAM blocks record 6 allocations.

Loading all IPAM pools...
  10.244.0.0/16
Found 1 active IP pools.

Loading all nodes.
Found 3 node tunnel IPs.

Loading all workload endpoints.
Found 3 workload IPs.
Workloads and nodes are using 6 IPs.

Loading all handles
Looking for top (up to 20) nodes by allocations...
  vm5 has 2 allocations
  vm4 has 2 allocations
  vm6 has 2 allocations
Node with most allocations has 2; median is 2

Scanning for IPs that are allocated but not actually in use...
Found 0 IPs that are allocated in IPAM but not actually in use.
Scanning for IPs that are in use by a workload or node but not allocated in IPAM...
Found 0 in-use IPs that are not in active IP pools.
Found 0 in-use IPs that are in active IP pools but have no corresponding IPAM allocation.

Scanning for IPAM handles with no matching IPs...
Found 0 handles with no matching IPs (and 6 handles with matches).
Scanning for IPs with missing handle...
Found 0 handles mentioned in blocks with no matching handle resource.
Check complete; found 0 problems.