Well, I'm giving up, I think I'll wait until I have a new PC to use this beautiful system, Thanks for the help
I solved it myself, many tests and forums led me to this command
xmodmap -e 'keycode 129 = NoSymbol'
Keycode 129 corresponds to the key ( . ) on the numeric keypad (my computer doesn't even have it)
It took me 10 months but I made it
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Never give up
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