I was lazy

- deinstall zm 1.30.4 + upgrade Debian 09->10 und then 10->11 + new install zm v1.6 ?
- Clean install Debian 11 (+ install zm v1.6)?
- Waiting for summer, till Debian 12 is available? *)
And: when Debian 12 will become stable - would I have to reinstall zm in case of upgrading 11->12?
Please give me some hints which way I should go - thx.
Centaurus17