[Collision] Preset List Missing Projectile

Hello,
I’m needing some help. I have a c++ project with some c++ objects.
I have a default c++ first person project in ue4 and I dont know what I’ve done but my projectile dont hit anything.
They just pass through everything (Walls, Cube, …). When I go into the Projectile BluePrint → Collision Comp → Collision ->Collision Preset It’s set to Custom but in others project It’s set to Projectile. So I’ve try to reset it to Projectile but in the list I cant find projectile …

Here’s what I see :

Here’s what I’m supposed to see :

Thank you in advance for any help !