Blueprints, how to set a BP Object variable to Null/None

Yeah I just tried it in a blank project to test, and it worked just fine in my blank project. I’m testing it by checking “IsValid”. So I think my code has a bug somewhere else and not related to this Nulling of the variable.

But would you say this is the correct way to Null/None out a variable? or is this considered a hack?

Thank you