When I fire the server my value changes somehow? How do I fix that?

I am making a hotel system and when I try to fire the server with a player, it sends the right player value but the other script prints out a different one. So it sent the name "dyslexia1" but the script got it as "poppeyhead" Any way to fix? Also, FE is on. Starter Gui Script:

script.Parent.FocusLost:connect(function(enterPressed)
    if enterPressed then
        local count = 0
        local plr = nil
        for i,v in next, game.Players:GetChildren() do
            if string.len(v.Name) >= string.len(script.Parent.Text) then
                if string.lower(script.Parent.Text) == string.lower(string.sub(v.Name,0,string.len(script.Parent.Text))) then
                    count = count+1
                    plr = v
                    print(v.Name)

                end
            end
        end
        if count == 1 and game.Players.LocalPlayer.Name ~= plr.Name then
                    script.Parent.Text = "Name :)"

                    local giver= game.Players.LocalPlayer
game.ReplicatedStorage.RoomSystem.Events.CheckIn:FireServer(plr) 
print(plr.Name)
                    script.Parent.Parent.Parent.Waiting.Visible=true
                    script.Parent.Parent.Visible=false
                    wait (1)
                    script.Parent.Parent.Parent.Parent:Destroy()
                    end
    end
end)

SSS Script:

game.ReplicatedStorage.RoomSystem.Events.CheckIn.OnServerEvent:connect(function(plr)
    pcall(function()
        print(plr.Name)
local target= plr
local rooms= game.ReplicatedStorage.RoomSystem.Rooms
local keys= game.ReplicatedStorage.RoomSystem.Keys
local room1= rooms:FindFirstChild("Room 1")
local room2= rooms:FindFirstChild("Room 2")
local room3= rooms:FindFirstChild("Room 3")
local room4= rooms:FindFirstChild("Room 4")
local room5= rooms:FindFirstChild("Room 5")
local key1= keys:FindFirstChild("Room 1")
local key2= keys:FindFirstChild("Room 2")
local key3= keys:FindFirstChild("Room 3")
local key4= keys:FindFirstChild("Room 4")
local key5= keys:FindFirstChild("Room 5")
print("HI")

if target ~= nil then
    print("Target not nil")
    if target.CheckOut.Value==true then
        print("running")
        target.CheckOut.Value= false
        target.CheckIn.Value= true
        if room1.Value== false then
            room1.Value= true
            target.Room.Value= 1


        local key= key1:Clone()
        key.Parent= plr.Backpack

            elseif room2.Value==false then
            room2.Value= true
            target.Room.Value= 2
                local key= key2:Clone()
        key.Parent= plr.Backpack



                elseif room3.Value==false then
                room3.Value= true
                target.Room.Value= 3

            local key= key3:Clone()
        key.Parent= plr.Backpack

                    elseif room4.Value==false then
                    room4.Value= true
                    target.Room.Value= 4
                        local key= key4:Clone()
        key.Parent= plr.Backpack



                        elseif room5.Value==false then
                        room5.Value= true
                        target.Room.Value= 5

            local key= key5:Clone()
        key.Parent= plr.Backpack

        end


    end
end
end)
end)