My custom equip script is not working and getting a code error?

I have disabled the backpack core gui so i could have a custom inventory system, and I made a script that when pressing 1 it equips the "Primary tool" and pressing 2 equips the "Secondary tool". I get the error: 16:22:18.964 - Unable to cast value to Object

local Player = game.Players.LocalPlayer
Mouse = Player:GetMouse()
local equipped = false
local primary = Player.PlayerData.Inventory.PrimaryTool.Value
local secondary = Player.PlayerData.Inventory.SecondaryTool.Value
print(primary.." "..secondary)

Mouse.KeyDown:connect(function(Key)
	if(Key:lower() == "1") then
		if equipped == false then
		Player.Character.Humanoid:EquipTool(primary)
		equipped = true
		print("equipped primary")
		elseif equipped == true then
		Player.Character.Humanoid:UnequipTools()
		equipped = false
		print("unequipped primary")
		end
		end
	if(Key:lower() == "2") then
		if equipped == false then
		Player.Character.Humanoid:EquipTool(secondary)
		equipped = true
		print("equipped secondary")
		elseif equipped == true then
		Player.Character.Humanoid:UnequipTools()
		equipped = false
		print("unequipped secondary")
		end
		end
end)