chain does not work correctly

[Sukuna]

Hello and thanks for reading, I have tried to create a magic similar to the global chain.
Here is the code that does not work as it should, could someone please help me to complete it.
inside:

monster.lua

monster.attacks = {
{name ="chaintres", interval = 2000, chance = 100, minDamage = 1, maxDamage = 3, target = false}
}

spells/chaintres.lua

local combat = Combat()
combat:setParameter(COMBAT_PARAM_TYPE, COMBAT_DEATHDAMAGE)
combat:setParameter(COMBAT_PARAM_EFFECT, CONST_ME_PINK_ENERGY_SPARK)

local spell = Spell("instant")

function spell.onCastSpell(creature, var)
    local spectators = Game.getSpectators(creature:getPosition(), false, true, 7, 7, 7, 7)
    if #spectators == 0 then
        return false
    end

    local attackerPos = creature:getPosition()
    local initialTarget = nil
    local previousTarget = nil

    for _, spectator in pairs(spectators) do
        if not initialTarget then
            initialTarget = spectator
        end

        if previousTarget then
            local targetPos = spectator:getPosition()
            local path = previousTarget:getPosition():getPathTo(targetPos, 0, 0, true, true, 8)
            if path and #path > 0 then
                for i = 1, #path do
                    attackerPos:getNextPosition(path[i], 1)
                    attackerPos:sendMagicEffect(CONST_ME_PINK_ENERGY_SPARK)
                end
                combat:execute(previousTarget, Variant(targetPos))
            end
        end

        previousTarget = spectator
    end

    if previousTarget and initialTarget then
        local targetPos = initialTarget:getPosition()
        local path = creature:getPosition():getPathTo(targetPos, 0, 0, true, true, 8)
        if path and #path > 0 then
            for i = 1, #path do
                attackerPos:getNextPosition(path[i], 1)
                attackerPos:sendMagicEffect(CONST_ME_PINK_ENERGY_SPARK)
            end
            combat:execute(creature, Variant(targetPos))
        end
    end

    return true
end

spell:name("chaintres")
spell:words("##1492")
spell:isAggressive(true)
spell:needTarget(false)
spell:needLearn(true)
spell:register()

The chain effect is incomplete and one of them does not receive damage.

could you make the chain effect hit both of them and they receive damage.