I want to redefine "C-c" to "backward-char" like (define-key global-map "\C-c" 'backward-char) because I've a BÉPO keyboard. However when I enable the c-mode, my bind is overridden by a prefix.

Major Mode Bindings:
key             binding
---             -------

C-c             Prefix Command

I have tested to redefine "mode-specific-command-prefix" like (define-key global-map "\C-y" 'mode-specific-command-prefix) in my init.el but my bind it's always overridden.