Aura removal - How do I remove an aura from a unit when he gets promoted?

[LordStark]

Hi everyone,

I have a lot of hero type units in my mod who get auras with longer range as they gain experience - but it seems as though they are keeping the original aura as well so you get three circles around a elite unit.

How do I remove the aura from unit_b when he becomes unit_a and then how do I remove the aura from unit_a when he becomes unit_e?

[Stan`]

Just like the production queue

-aura_name