Changing Execution on PS5 Controller

I'm using the ps5 controller while playing on PC. How can I change the Execution skill button? Right now, I can only assign it to the existing preset options, and it seems like I can’t create a custom input. If anyone has managed to change it, I’d appreciate it if you could share what button you mapped it to. At the moment, whenever I press the Execution skill, my character jumps backward because the default Triangle + Circle combination triggers it. Any help would be appreciated.