For most of the damage-dealing cantrips, it seems that heightening them changes the number of damage dice, but not the type of damage dice. However, Produce Flame starts as 1d4, and heightening it changes it to 1d6 + spellasting ability, then 2d6, etc. etc. Is this an error, or is this spell supposed to change damage dice? If it is an error, should it be all 1d6 damage, or all 1d4?
