İs it ok to change right click mouse to left? Riot?

so i can change my right mouse attack to almost anything but left click. can someone tell me why and how to fix it? or is it lethal to change it?

We're testing a new feature that gives the option to view discussion comments in chronological order. Some testers have pointed out situations in which they feel a linear view could be helpful, so we'd like see how you guys make use of it.

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