bug: Automarker removes extra marker in UCOB

[valarnin]

If you have both (P2) Fireball automarker and (P2) Chain Lightning automarker enabled, and the fire tether player during 2nd fire tether also gets the chain lightning debuff, the fireball AM will remove the chain lightning AM.

No clue how these are coded, but would it be possible to have FB marker only remove the marker if it's the same one that was already applied?

(this can probably happen in other content that has overlapping mechanics with AM supported)