MaxForce cannot be assigned to?

local Main = script.Parent.Parent.Parent.MAIN
local Velocity = Main.Velocity

Velocity.maxForce = Vector3.new(math.huge,0,math.huge)
Gyro.maxTorque = Vector3.new(0,math.huge,0)
Gyro.cframe = CFrame.new(Main.Position,game.Players[mouse]:GetMouse().Hit.p) -- (mouse is defined as the player's name)

[(https://cdn.discordapp.com/attachments/708647412779974667/713939924860010546/03f3512905c9b61dcf79ec9951e403f6.png)

[(https://cdn.discordapp.com/attachments/708647412779974667/713939267898048542/df90e22648fa9e136eb7931d0cb13ed0.png)

So I'm getting this error saying 'MaxForce cannot be assigned to' and I have no clue how to fix it so I came here, all relevant info is listed above.