Cannot run a previous version of Zeppelin on the same computer

Hello Zeppelin Team,

I'm actually testing several versions of Zeppelin on my Ubuntu 20.04 LTS computer.

I installed Zeppelin 0.8.1, 0.8.2 and 0.9.0-preview2.

After having run 0.9.0-preview2, if i run Zeppelin 0.8.2, your predefined Notes are looking like on the attached PNG and I cannot add a new note.

I don't really understand, what's happening...

FYI and BR,

Gilles