Why are u using element data while u can do this cuz blip is global defined
function baseblip(player)
if (not blip) then
blip = createBlip ( 1972.5458984375, -1113.5166015625, 25.628751754761, 59,2,0,0,0, 255,0, 99999)
else
destroyElement(blip)
end
addCommandHandler("baseblips",baseblip)
that's simple