The iptables service does not start with error: iptables.init: Applying firewall rules | Error occurred at line

Issue

During OpenStack Recovery of failed controlled node,the iptables service could not start with below error:

systemd[1]: Starting IPv4 firewall with iptables...
iptables.init[582478]: iptables: Applying firewall rules: iptables-restore v1.4.21: Set NIPv43438953e-16ee... exist.
iptables.init[582478]: Error occurred at line: 176
iptables.init[582478]: Try `iptables-restore -h' or 'iptables-restore --help' for more information.
iptables.init[582478]: [FAILED]
systemd[1]: iptables.service: main process exited, code=exited, status=1/FAILURE