Code works but still get an error (Attribute or Skill for Edge)

[Gumbytie]

Here is the code:

validif (hero.child[attrSpi].field[trtFinal].value >= 6)
validif (hero.child[skBBDreaming].field[trtFinal].value >= 5)
if (@ispick <> 0) then
   altpick.linkvalid = 0
endif

Prereq for an Edge, either Have Spirit 12+ or Dreaming (Arcane) skill d10+. So it works but gives an error if the character hasn't actually purchased the skill Dreaming (Arcane) first. I figure I don't want hero.child for skBBDreaming but not sure what to use instead.