Factorio 2.0 has slight difference to how it accepts recipes for quality, we need a table, you can open data.lua and on line 18 I think you have the recipe, you can update it to this and it will work:
{
type = "recipe",
name = "very-long-handed-inserter",
enabled = false,
energy_required = 0.5, -- optional but recommended
ingredients = {
{ type = "item", name = "iron-stick", amount = 4 },
{ type = "item", name = "iron-gear-wheel", amount = 3 },
{ type = "item", name = "long-handed-inserter", amount = 1 },
},
results = {
{ type = "item", name = "very-long-handed-inserter", amount = 1 }
}
},
Difference from original recipe - ingredients are a table, "result" changed to "results" and is a table.