Juju actions change of behavior between 2.6 and 2.7 causes it to fail

[Pedro Guimarães]

Hi,

Recently upgraded from 2.6.10 to 2.7.0 and I am trying to run some actions, but I am seeing that show-action-output is not working the way it used to:

$ juju run-action --wait graylog/0 show-admin-password
ERROR identifier "1" matched multiple actions [action-1 action-1724887b-9d6a-4421-8cb9-5c14bc3cb646 action-18683603-43d7-4c1a-87eb-79b715ad8237 action-1b7cf07d-fe43-41d2-817a-6b0d03673571 action-1fecea5b-c8ef-4269-8c21-57edc75277e1]

$ juju run-action graylog/0 show-admin-password
Action queued with id: "2"
$ juju show-action-output 2
ERROR identifier "2" matched multiple actions [action-2 action-20a22fc3-8af4-47ee-8dce-e4ca07cea995 action-2363775a-943f-43a0-8bfa-ad01bccc2dec]
$ juju show-action-output action-2
ERROR actions for identifier "action-2" not found

I can see juju actions is undergoing some changes recently:
https://discourse.jujucharms.com/t/new-features-and-changes-in-juju-2-7/2268

It is not yet clear how can I interact with this new CLI commands.
I do not have access to commands such as call or juju operations. Neither on stable nor candidate 2.7 channels have.
However, if I follow the instructions as described on juju show-action-output --help, I get the above.