Difference between custom movement and custom?

I'm working on a template I bought and I was trying to substitute an object on the event sheet with another object but the program doesn't allow it because the new object needs the same behaviors. The original object has "custom movement" as behavior and I can only find "custom" on the behavior list which apparently is a different thing.

I think it's the same behavior, just a different name. Try renaming it on the object.