How to find a model, then change his parent?

So I'm trying to make a basic map cache that after it is selected, it would take the last map from the cache and put it back in the pool and then take the selected map and put it in the cache. However, my method doesn't take the last map from the cache, so the game works until it runs out of maps. Here's the script:

local currentMap = MapsToChoose[math.random(#MapsToChoose)]
local workspace_map = game.ServerStorage.Maps[currentMap]:Clone()
local outside_map = game.ServerStorage.Maps[currentMap]
local outcache = game.ServerStorage.OutMaps
workspace_map.Parent = game.Workspace.CurrentMap
outcache:GetChildren().Parent = game.ServerStorage.Maps
outside_map.Parent = game.ServerStorage.OutMaps

local currentMap = MapsToChoose[math.random(#MapsToChoose)]
local workspace_map = game.ServerStorage.Maps[currentMap]:Clone()
local outside_map = game.ServerStorage.Maps[currentMap]
local outcache = game.ServerStorage.OutMaps
workspace_map.Parent = game.Workspace.CurrentMap
for i,v do in  pairs(outcache:GetChildren()) do
v.Parent = game.ServerStorage.Maps
outside_map.Parent = game.ServerStorage.OutMaps
end