You will need Bazaar version 2.0 or more recent to be able to fully interact with those upgraded branches. You can check your Bazaar version by issuing
bzr --versionin a shell.
Here is how to upgrade if you need to:
- You will find the instructions to install Bazaar 2 for your platform on Bazaar download page.
- Make a backup of the branches you need to upgrade.
- Upgrade the relevant branches with this command:
bzr upgrade --2a