How come my tree can not run it's script again?

	hits = script.Parent.hit --This keeps track of how much "hp" the tree has left
local newtree = script.Parent:clone() --for inserting a new tree later

while true do --infinite loop
if hits.Value < 1 then --if the tree has less than 1 "hp" then
	script.Parent:BreakJoints() --make tree able to fall over. 
	wait(3) --wait a while
	script.Parent:remove() --remove the tree
	wait(10) --wait a while
	newtree.Parent = game.Workspace --insert a new tree
	newtree:MakeJoints() --make tree unable to fall over
end
wait(1) --wait a while before checking trees hp again
end

Hello, thank you for reading! What I'm trying to do is that when a tool named "Axe" hits and takes all the tree's HP, then the tree will die and give you money. My problem is that the tree dies, and after it regenerates, it's script doesn't work. You can't kill it again. This is a new edited script I tried to do.

hits = script.Parent.hit --This keeps track of how much "hp" the tree has left
local newtree = game.Lighting.newtree2 --for inserting a new tree later

while true do --infinite loop
	debounce = true
if hits.Value < 1 then
	if script.Parent:isA("Model") then --if the tree has less than 1 "hp" then
	script.Parent:BreakJoints() --make tree able to fall over. 
	wait(3) --wait a while
	script.Parent:remove() --remove the tree
	wait(5) --wait a while
	newtree.Parent = game.Workspace --insert a new tree
	newtree:MakeJoints() --make tree unable to fall over
	debounce = false
end
wait(1) --wait a while before checking trees hp again
end
end

What I added was the if script.Parent:isA("Model") then part, but when I Play in the game, the server does not start. I think it is because of the while true do part, which causes the game to repeat the scripts so much the server doesn't lag.

Sorry for the long explanation, and if anyone can help me, I would be so grateful!

You mispelled it, capitalize the i in isA() ---->

if script.Parent:IsA("Model") then [INSERT CODE HERE] end

You can use the Changed event like this:

hits = script.Parent.hit --This keeps track of how much "hp" the tree has left
local newtree = script.Parent:clone() --for inserting a new tree later

hits.Changed:connect(function()
	if hits.Value < 1  then 
		script.Parent:BreakJoints()
		wait(3)
		script.Parent:remove() 
		wait(10) 
		newtree.Parent = game.Workspace 
		newtree:MakeJoints()
	end
end)