Why does the humanoid die instantly when the other one dies instead of taking damage?

local CheemS = script.Parent.Cheems
local BuffDoge = script.Parent.BuffDoge

CheemS.Boss.Died:Connect(function()
    BuffDoge.Boss:TakeDamage(100)
    
end)

i'm trying to make it so when a humanoid dies the other one will take damage but instead of whats intended the other humanoid just straight up dies here is a demonstration and yes it did take 100 damage from the script but it somehow dies instantly idk whats happening which i'm concerned https://gyazo.com/8217b7836b58be83da8ed72b5540b909

You're dealing the 100 damage, which is the default maximum health on a humanoid. Check the NPC's humanoid properties and set max health to something above 100, and set the health to max health.

You could set the health of the humanoid to -100 of what it is.

local CheemS = script.Parent.Cheems
local BuffDoge = script.Parent.BuffDoge

CheemS.Boss.Died:Connect(function()
    BuffDoge.Boss.Health -= 100
end)