How do I do this action with a family?

what I want to do:

family: block

event: ondrop block

sub-event: block overlapping with block

action: destroy block (only the block that I'm dropping)

nothing happens while it works if I do the same thing with 2 different objects not in the same family.

Just add another family to check collision with

on drop family1

family1 overlaps family2

family1 - do action

family2 - do action