Comment 0 for bug 2030944

ovn-chassis and ovn-central charms sync ovn packages from different repos, because of different versions in both of them:
      | ovn-22.03 | focal-updates | linux-any all

ovn-central (focal-updates/yoga/main):
 ovn-common | 22.03.2-0ubuntu0.22.04.1~cloud1 | yoga | focal-updates | linux-any all

ovn-chassis (focal-updates/ovn-22.03/main):
 ovn-common | 22.03.0-0ubuntu1~cloud0

This needs to be addressed, as during migration from ovs to ovn this causes the ovn-chassis to not be able to register with the central units with:

2023-08-10T07:28:24.235Z|02840|main|WARN|controller version - 22.03.0-20.21.0-58.3 mismatch with northd version - 22.03.2-20.21.0-61.4

The workaround is to use this to prevent the check, but if left there it's dangerous during future upgrades of ovn:

ovs-vsctl set open . external_ids:ovn-match-northd-version="false"