how do i stop .Touched from spamming?

so im making a game where it has some super powers like shooting fire balls and im having some problems with a hit function in the script. this is the hit part:

fireBall.Touched:Connect(function(hit)
        if hit:IsDescendantOf(character) or hit:FindFirstChild("ParticleEmitter") then return end
		if caster == player then
			game.ReplicatedStorage.Events.FireBall:FireServer(hit)
		end
    end)

this fires when the fireball hits a player. i want the fireball to carry on and damage everyone it touches without spamming the damage

i dont want to destroy teh fireball when it touches a player so if there is a group of people i want it to damage all of them. right now whats happening is that when it touches a player it damages them multiple times by firing many remotes. how would i stop it from doing that?

You should add a debounce for example:

local debounce = false

fireBall.Touched:Connect(function(hit)
        if hit:IsDescendantOf(character) or hit:FindFirstChild("ParticleEmitter") then return end
        if caster == player and not debounce then
		debounce = true
            	game.ReplicatedStorage.Events.FireBall:FireServer(hit)
        end
end)

However, this would make the fireball only hit once (to one player).

So if you wanted to make the fireball only damage people once, you would most likely have to create a table of players and insert the player name into it (when the player is hit), and only hit people who's name isnt in the table