Recipes with double of the same input cause a crash

[Vizjereii]

There is a crash happening if you select a recipe with same input doubled (in pyanodon's mods there is a building called Jig that requires two separate water inputs for example)

Error while running event helmod::on_gui_click (ID 1)
Gui element with name cell_water already present in the parent element.
stack traceback:
helmod/core/ElementGui.lua:842: in function 'addGuiTable'
helmod/core/ElementGui.lua:856: in function 'addCell'
helmod/core/ElementGui.lua:977: in function 'addCellElement'
helmod/tab/ProductionBlockTab.lua:396: in function 'addTableRow'
helmod/tab/ProductionBlockTab.lua:256: in function 'updateData'
helmod/tab/MainTab.lua:644: in function 'update'
helmod/tab/MainTab.lua:210: in function 'buildPanel'
helmod/core/MainPanel.lua:83: in function 'main'
helmod/controller/Controller.lua:182: in function 'onGuiClick'
helmod/core/Event.lua:195: in function <helmod/core/Event.lua:186

as a quick and dirty fix i hacked this together (this is my first time with lua so im sure this is incorrect, but at least it fixes the issue for me) in the addGuiTable function:

function ElementGui.addGuiTable(parent, key, column_count, style)
  local options = {}
  options.type = "table"
  options.column_count = column_count
  local isDuplicate = false
  for i, key_name in ipairs(parent.children_names) do
    if key_name == key then
    isDuplicate = true
    end
  end  
  if isDuplicate then
  options.name = "double_"..key
  else
  options.name = key
  end
  if style ~= nil then
    options.style = style
  end
  return parent.add(options)
end