[Request]: Unkown Command M207 x8/x20

[d35ptn]

Good morning everyone,
This morning I wanted to print a few things on my Geeetech A30 which now has Marlin as software, but I kept getting these 2 errors: Unkown Command M207 x8 and Unkown Command M207 x20, which continued to pop up on the display even if I press "ok". I have looked around a bit but unfortunately as much as understanding what this "m207" command stands for (apparently retraction?), I can't understand what the x8 and x20 stand for.
Moreover, I tried to deactivate the "enable retraction" feature in Cura, but the error kept popping up whenever I tried printing.
All the previous work on this printer was done by my father, but now I'd like to understand how this works and what I can do to solve this error.
Thank you to whoever will help me and I apologize for my bad English.
Greetings from Italy.

[d35ptn]

Good morning again,
I managed to solve this problem by myself, thanks again.