Please help my script won't work why? My script keeps breaking and crashing? (Read desc)

I'm trying to make it so when it regen it won't announce saying "This model is being regen" here's the script

object = script.Parent 
if (object ~= nil) and (object ~= game.Workspace) then 
model = object 
messageText = "regenerating " .. model.Name .. "" 

message = Instance.new("Message") 
message.Text = messageText 
backup = model:clone() -- Make the backup 
waitTime = 255 --Time to wait between regenerations 
wait(math.random(0, waitTime)) 
while true do 
wait(waitTime) -- Regen wait time 

message.Parent = game.Workspace 
model:remove() 

wait(2.5) -- Display regen message for this amount of time 

model = backup:clone() 
model.Parent = game.Workspace 
model:makeJoints() 
message.Parent = nil 
end 
end