How to get over fear of jumping into water from a ledge?

Hi everyone, this sounds so silly but I’m desperate for advice.

Some context, I have this fear of jumping into water off ledges. I know how to swim and have zero problems with that, I don’t care about my face getting wet, I’m also okay with going under water at my own pace. Idk when this fear started but now I’m in the middle of getting some training done for work and we have to jump off a 6’ ledge at the end and I’m panicking over it.

I’m hoping someone has advice or tip and tricks that helped them