WHy is the server receiving this function once PER PLAYER IN GAME?

So Ive got this gun system and its pretty bugged as in, when you fire one shot it damages the player once PER PERSON in game, so if there are 3 players in-game the target takes damage 3 times, for whatever reason the server is receiving the event once per person in-game.

ServerScript in ServerScriptService

local InflictTarget = game.ReplicatedStorage.InflictTarget
InflictTarget.OnServerEvent:Connect(function(Player,Tool,Tagger,TargetHumanoid,TargetTorso,Damage,Misc)
	local CanDamage = true
	print("server event happened")
	print(Damage)
	if Tagger and TargetHumanoid and TargetHumanoid.Health ~= 0 and TargetTorso and CanDamage then
		while TargetHumanoid:FindFirstChild("creator") do
			TargetHumanoid.creator:Destroy()
		end
		CanDamage = false
		local creator = Instance.new("ObjectValue",TargetHumanoid)
		creator.Name = "creator"
		creator.Value = Tagger
		game.Debris:AddItem(creator,5)
		print("damage dealt")
		TargetHumanoid:TakeDamage(Damage)
		CanDamage = true
	    if Misc[1] > 0 then --knockback
		    local shover = Tagger.Character.HumanoidRootPart or Tagger.Character.Head
		    local duration = 0.1
		    local speed = Misc[1]/duration
		    local velocity = (TargetTorso.Position - shover.Position).unit * speed
		    local shoveForce = Instance.new("BodyVelocity")
		    shoveForce.maxForce = Vector3.new(1e9, 1e9, 1e9)
		    shoveForce.velocity = velocity
		    shoveForce.Parent = TargetTorso
		    game:GetService("Debris"):AddItem(shoveForce, duration)
		end
		if Misc[2] > 0 and Tagger.Character.Humanoid and Tagger.Character.Humanoid.Health ~= 0 then --lifesteal
			Tagger.Character.Humanoid.Health = Tagger.Character.Humanoid.Health + (Damage*Misc[2])
		end
		if Misc[3] then --flame
			local Debuff = TargetHumanoid.Parent:FindFirstChild("IgniteScript") or Tool:FindFirstChild("GunScript_Server"):FindFirstChild("IgniteScript"):Clone()
			Debuff.creator.Value = Tagger
			Debuff.Disabled = false
			Debuff.Parent = TargetHumanoid.Parent
		end
	end
end)

LocalScript in StarterPlayerScripts (Just the part that deals with damage)

	if not ExplosiveData[1] then
	    if HitPart and HitPart.Parent and HitPart.Transparency < 0.9 then --Test if we hit something
		    local TargetTorso = HitPart.Parent:FindFirstChild("HumanoidRootPart") or HitPart.Parent.Parent:FindFirstChild("HumanoidRootPart")
		    local Tagger = game.Players:GetPlayerFromCharacter(Tool.Parent)
			local TargetHumanoid = HitPart.Parent:FindFirstChild("Humanoid") or HitPart.Parent.Parent:FindFirstChild("Humanoid")
		    if TargetHumanoid and TargetHumanoid.Health > 0 and TargetTorso then
			    MakeBloodFX(HitPart, HitPoint, Normal, BloodEffectData, FleshHoleData)
			print("damage remote fired")
				game.ReplicatedStorage:WaitForChild("InflictTarget"):FireServer(Tool,
					                                                            Tagger,
					                                                            TargetHumanoid,
								                                                TargetTorso,
								                                               (HitPart.Name == "Head" and DamageData[3]) and DamageData[1] * DamageData[2] or DamageData[1],
								                                               {Misc[1],Misc[2],Misc[3]})
			    Tool.GunScript_Local:FindFirstChild("MarkerEvent"):Fire(HitPart.Name == "Head" and DamageData[3])
		    else
		        MakeImpactFX(HitPart, HitPoint, Normal, HitEffectData, BulletHoleData)
		    end
	    end