Left shift key has been typing out this symbol "|"

Just recently, my left shift key has been typing out this symbol | when I press it. But only when I press it on the left side closer to the Z. This is making it hard for me to capitalise my letters and is quite annoying.

||See this is what my sentence looks like when |I use my shift like I| normally would, without consciously pressing it on the far left side. |Stupid vertical bar. It spams if I hold it down, too. ||||||||||||

I use a Cougar Vantar RGB Scissor Switch Gaming Keyboard. Since this is a recent problem, I assume that I have toggled something without knowing?

Thank you for your help!