[wardz]

Combat log event handling looks like this now:

local function OnEvent(self, event)
    if event == "COMBAT_LOG_EVENT_UNFILTERED" then
        local _, subEvent, _, srcGUID, srcName, _, _, dstGUID, destName, _, _, spellId = CombatLogGetCurrentEventInfo()
 
 
        if subEvent == "SPELL_AURA_APPLIED" and spellId == 421972 then
            UpdateRaidDebuffList()
        elseif subEvent == "SPELL_AURA_REMOVED" and spellId == 421972 then
            local icon = GetRaidTargetIndex(destName)
            if icon then
                table.insert(raidTargetIcons, icon)
                ClearRaidTargetIcon(destName)
                print(destName .. "'s Controlled Burn debuff has been removed.")
            end
        end
    end
end

The spellId I were refering to earlier is the one inside your UpdateRaidDebuffList function, but not in the combat log event, that one is correct.
Is 'castSuccess' a special variable return thats required for Controlled Burn? If you don't need it, the script can be simplified a lot. (Arguments for table.remove also seems incorrect, its missing the index you want to remove) Let me know and I can post a full example later.


For future cases, you might also want to look into the UNIT_AURA event. This is generally the event you want for these kind of things unless you need to track units that are not in your group or not currently targetted.