The error is raised from Kuryr: https://github.com/openstack/kuryr-libnetwork/blob/master/kuryr_libnetwork/controllers.py#L1427 . I guess the error will disappear after your kuryr installation contains this feature: https://blueprints.launchpad.net/kuryr-libnetwork/+spec/existing-subnetpool .
The error is raised from Kuryr: https:/ /github. com/openstack/ kuryr-libnetwor k/blob/ master/ kuryr_libnetwor k/controllers. py#L1427 . I guess the error will disappear after your kuryr installation contains this feature: https:/ /blueprints. launchpad. net/kuryr- libnetwork/ +spec/existing- subnetpool .