Why doesn't the body velocity in the "Plasma Blast" work after you used it once?

There's nothing wrong with this script. The problem is when I use it once, and I try use it again, the blast will stay in one spot.

Script:

plr = game.Players.LocalPlayer
mouse = plr:GetMouse()
dmg = script.Damage
unlocked = plr.PlasmaC.Value
debounce = true

mouse.KeyDown:connect(function(spell)
	if spell == "e" and unlocked == true and debounce == true then
		debounce = false
		print("PlasmaCannon")
		game:GetService("Chat"):Chat(plr.Character.Head, "Plasma Cannon!")
		p = Instance.new("Part", workspace)
		game.Debris:AddItem(p, 6)
		p.Shape = "Ball"
		p.Size = Vector3.new(10,10,10)
		p.Name = "PlasmaCannon"
		p.TopSurface = "Smooth"
		p.BottomSurface = "Smooth"
		p.CanCollide = false
		p.BrickColor = BrickColor.new("Bright blue")
		p.Transparency = .2
		p.Anchored = false
		f = Instance.new("Fire", p)
		f.Size = 24
		f.Heat = 11
		f.Color = Color3.new(0, 55, 255)
		f.SecondaryColor = Color3.new(0, 31, 145)
		v = Instance.new("BodyVelocity", p)
		v.velocity = plr.Character.Torso.CFrame.lookVector*90
		v.maxForce = Vector3.new(math.huge, math.huge, math.huge)
		p.CFrame = plr.Character.Torso.CFrame*CFrame.new(0, 0, -12)
	end
	wait(0.7)
	debounce = true
end)

Just move this code;

wait(0.7)
debounce = true

Into the If Then statement.

plr = game.Players.LocalPlayer
mouse = plr:GetMouse()
dmg = script.Damage
unlocked = plr.PlasmaC.Value
debounce = true

mouse.KeyDown:connect(function(spell)
    if spell == "e" and unlocked == true and debounce == true then
        debounce = false
        print("PlasmaCannon")
        game:GetService("Chat"):Chat(plr.Character.Head, "Plasma Cannon!")
        p = Instance.new("Part", workspace)
        game.Debris:AddItem(p, 6)
        p.Shape = "Ball"
        p.Size = Vector3.new(10,10,10)
        p.Name = "PlasmaCannon"
        p.TopSurface = "Smooth"
        p.BottomSurface = "Smooth"
        p.CanCollide = false
        p.BrickColor = BrickColor.new("Bright blue")
        p.Transparency = .2
        p.Anchored = false
        f = Instance.new("Fire", p)
        f.Size = 24
        f.Heat = 11
        f.Color = Color3.new(0, 55, 255)
        f.SecondaryColor = Color3.new(0, 31, 145)
        v = Instance.new("BodyVelocity", p)
        v.velocity = plr.Character.Torso.CFrame.lookVector*90
        v.maxForce = Vector3.new(math.huge, math.huge, math.huge)
        p.CFrame = plr.Character.Torso.CFrame*CFrame.new(0, 0, -12)
        wait(0.7)
        debounce = true
    end
end)