Too many buttons/keys to change and stuck each one

[AMD Ryzen 7 5200HX 2.9GHz]

Why is that Rockstar games have too many buttons to remember and when I want to edit the keybindings for my own keyboard/mouse usage, there is always one got unbound meaning game wont let me save my changes. Dumb, let me use whatever keyboard key I want without worrying about some other key. Some old games lets the user to "erase" keys letting it blank too bad Rockstar too busy counting dollars

[Monke-Cat]

One of the biggest complains about the game was that One key oftenly does many things at tge same time and It causes accidents and unintended actions now here you are are tellung the opposite
Yes You will need all those keys to be set at something because at somepoint in the story they're essential even if you for example never lift up your horse saddle and putting in on another horse , even if you never clean your horse etc
You should have at least 100 keys on your keyboard , how comes that you run out of them? just swap back the newly set and originals . You don't need all of the keys to be set at something easy to access , priorities their accessibility accordingly to their usage
for example
I personally , Don't use "give reins" , "Pet horse" , and what ever X does originally so I gave them to my secondary and shoulder weapons from 7 and 8 to X and Z , also throwables from I think number 5 to G so I don't have to use the wheel menu everytime and I get faster in combat situations .

[maldorf]

Im pretty sure you can go ahead and assign an action to a key thats already assigned, but it will take off the other action that was previously on there and youll need to find a different key for that if you want to use it. Personally, I dont think I changed anything.
Hopefully your mouse has lots of buttons, and you can use some of those. Like pressing down on the scroll wheel, and mine has two extra buttons on the left side.

[Bad 💀 Motha]

If it unbinds something just bind that something else afterwards. Which is probably what you were going to do anyways. However some keys have more then one action to which you can't unbind or separate that.

Best way really is not go and change too many of the Keyboard binds, instead get a Mouse with extra binds and then use Macro assigning to those extra mouse buttons that the game does not use by default.

Some of these changes were helpful to me.

Things in mini-games and wilderness camp that use left/right mouse buttons, I add an extra bind for these so Numpad-7 can act as Left Mouse Button and Numpad-9 can act as Right Mouse Button. I also added Left, Down and Right arrows to act as A, S, D for Five-Finger-Fillet; as it was hard on Keyboard to get the timing down well with just using my left hand; this allows using two hands. The Dead-Eye Marking (Q button) I mapped to an extra Mouse Side Button. I also map one to the mouse for Look Behind, which is helpful when going around at full speed and already have your left hand full as it is controlling the horse, weapons switching and such. The rest I pretty much left as-is.