How to reset i3 config files to its default ?

After installing i3, I accidentally press on the second option which is "Do not generate config files".

Now, I want to use the default config files which is option 1.

I tried this command :

$i3 -c /etc/i3/config

and I ended up with this error,

suhaib@suhaib:~$ i3 -c /etc/i3/config
deciding for version 4 due to this line: # i3 config file (v4)
font -misc-fixed-medium-r-normal--13-120-75-75-C-70-iso10646-1
    Found keysym binding mod8 with key Return and command exec i3-sensible-terminal
    Found keysym binding mod9 with key q and command kill
    Found keysym binding mod8 with key d and command exec dmenu_run
    Found keysym binding mod8 with key j and command focus left
    Found keysym binding mod8 with key k and command focus down
    Found keysym binding mod8 with key l and command focus up
    Found keysym binding mod8 with key semicolon and command focus right
    Found keysym binding mod8 with key Left and command focus left
    Found keysym binding mod8 with key Down and command focus down
    Found keysym binding mod8 with key Up and command focus up
    Found keysym binding mod8 with key Right and command focus right
    Found keysym binding mod9 with key j and command move left
    Found keysym binding mod9 with key k and command move down
    Found keysym binding mod9 with key l and command move up
    Found keysym binding mod9 with key semicolon and command move right
    Found keysym binding mod9 with key Left and command move left
    Found keysym binding mod9 with key Down and command move down
    Found keysym binding mod9 with key Up and command move up
    Found keysym binding mod9 with key Right and command move right
    Found keysym binding mod8 with key h and command split h
    Found keysym binding mod8 with key v and command split v
    Found keysym binding mod8 with key f and command fullscreen
    Found keysym binding mod8 with key s and command layout stacking
    Found keysym binding mod8 with key w and command layout tabbed
    Found keysym binding mod8 with key e and command layout default
    Found keysym binding mod9 with key space and command floating toggle
    Found keysym binding mod8 with key space and command focus mode_toggle
    Found keysym binding mod8 with key a and command focus parent
    Found keysym binding mod8 with key 1 and command workspace 1
    Found keysym binding mod8 with key 2 and command workspace 2
    Found keysym binding mod8 with key 3 and command workspace 3
    Found keysym binding mod8 with key 4 and command workspace 4
    Found keysym binding mod8 with key 5 and command workspace 5
    Found keysym binding mod8 with key 6 and command workspace 6
    Found keysym binding mod8 with key 7 and command workspace 7
    Found keysym binding mod8 with key 8 and command workspace 8
    Found keysym binding mod8 with key 9 and command workspace 9
    Found keysym binding mod8 with key 0 and command workspace 10
    Found keysym binding mod9 with key 1 and command move container to workspace 1
    Found keysym binding ...