What dose this Error Means? Error:(10,27)Expected identifier when parsing expression,got'+'

i made an touch function and that function will increase my intvalue and teleport player But intvalue is not increasing.

i am confused that what to do.

on 10 line (game.workspace.PL.Value) underlined with red color

it says This:

Error:(10,27)Expected identifier when parsing expression,got'+'

Script:

function onTouch(part)
if part.Parent.Humanoid ~=nil then
part.Parent:MoveTo(script.Parent.Parent.Part1.Position)     
script.Parent.Parent.Part1.Script.Disabled = true 
wait(2)
script.Parent.Parent.Part1.Script.Disabled = false
end
end
script.Parent.Touched:connect(onTouch)
game.workspace.PL.Value + 1