Can I remove collision of Sphere_inversenormals?

I made a AnimNotify to fire projectiles in AnimSequence/AnimMnotage but the projectiles never showed up in Persona. However, it worked well in game. Then I found it was because in Persona the projectiles hit a static mesh named “Sphere_inversenormals” just after they spawned and destroyed themselves. If I remove the collision of the mesh, then I can see the projectiles fly thru air as well. But the mesh is an engine asset, I am not sure if it causes any problems?