Delete Root or how to fix the problem?

[AnatolyB]

I have a problem. Two versions installed of ROOT ( Version 5.34/30 and Version 6.14/02)
ROOT reported an error:

---

ROOT Version: Version 5.34/30 and Version 6.14/02
Platform: Lunax Ubuntu 18
Compiler: Not Provided

[Wile_E_Coyote]

Missing Canvas

Honestly speaking, sooner or later, you will learn by hard that the policy of using a “system-provided” ROOT version (e.g. in “/usr/[bin|lib]” or “/usr/local/[bin|lib]”) is a dead end. You will learn that you need something like three different versions of ROOT - just because something that works with a particular ROOT version is not working with another ones, or because some piece of your additional, experiment / analysis specific, software explicitly requires a particular ROOT version. The s…

[Axel]

And note that this is a clash between ROOT v5.34/30 and v5.34/34. ROOT 6.14/02 is not in the way.