Please help me, I have a important problem in procedure coding!

I'm making a range weapon like a grenade. But it's always hit me when I throw this.

So I'm trying to find the ways to this projectiles will NOT hit me, just only hits another player or mob entity.

But, why this way is not working? It's always build failed. What am I wrong?

I want the projectiles doing hit only another player or entity, not me.