Comment 1 for bug 1874719

HAving looked into it further it seems to be the name of the node that has changed.

juju deploy cs:bionic/ubuntu bionic-ubuntu
juju deploy cs:focal/ubuntu focal-ubuntu

juju run --unit bionic-ubuntu/0 "sudo apt install --yes crmsh pacemaker"
juju run --unit focal-ubuntu/0 "sudo apt install --yes crmsh pacemaker"

$ juju run --unit focal-ubuntu/0 "sudo crm status"
Cluster Summary:
  * Stack: corosync
  * Current DC: node1 (version 2.0.3-4b1f869f0f) - partition with quorum
  * Last updated: Fri Apr 24 15:03:52 2020
  * Last change: Fri Apr 24 15:02:20 2020 by hacluster via crmd on node1
  * 1 node configured
  * 0 resource instances configured

Node List:
  * Online: [ node1 ]

Full List of Resources:
  * No resources

$ juju run --unit bionic-ubuntu/0 "sudo crm status"
Stack: corosync
Current DC: juju-27f7a7-hatest2-0 (version 1.1.18-2b07d5c5a9) - partition WITHOUT quorum
Last updated: Fri Apr 24 15:04:05 2020
Last change: Fri Apr 24 15:00:43 2020 by hacluster via crmd on juju-27f7a7-hatest2-0

1 node configured
0 resources configured

Online: [ juju-27f7a7-hatest2-0 ]

No resources