Problem installing LinuxCNC file linuxcnc_2.9.3_amd64.deb

I have an old installation of LinuxCNC made years ago by someone else on my Optiflex-7020 computer. For some reason, nothing works anymore and the guy is unreachable.
I want to start for scratch.
I plugged a blank hard drive (SATA 160Gb) in the computer, then successfully installed Linux Mint 22.1 (Cinnamon 64 bit).
From the web site linuxcnc.org/downloads/ I chose  LinuxCNC package for RTAI kernel 5.4.25  .After right clicking on the file "open with Gdebi", here is the error message that appears <the dependency cannot be satisfied : libboost-python1.74.0-py311.
Need help (I am a beginner with Linux but I can manage with steps and instructions - a bit of experience). What do you suggest? The goal is to run LinuxCNC with a simple interface and have access to basic applications (Firefox, libreOffice etc.).
Thanks in advance.

Apt (and package managers in general) are really annoying when it comes to irrelevent versions of thing like python.

Try installing from the official 2.9.4 ISO, It's probably easier.

www3.langdonstaab.ca/iso/linuxcnc_2.9.4-amd64.hybrid.iso

For a parallel port system, 2.7.14 is often recommended due to its lower latency.

www3.langdonstaab.ca/iso/linuxcnc-2.7.14-wheezy.iso

Though 2.9.4 willlikely work fine for any setup.

I will try that... ang give news

What has happened is that the package you tried to install was build on a system with a different version of python.

The reason the package manager has given you this message and wont install is it can not install the version of a package to make things work. From version to version things change, modules are left out or with Python they change almost everything from Python2 to Python3. So yes versions do matter, even small changes to the API and what that particular package may depend on, its there to stop you having a broken system.

Please ignore this comment

Apt (and package managers in general) are really annoying when it comes to irrelevent versions of thing like python.

as the poster has a disconnect between what he thinks he knows, what he knows and what is in fact actually reality.