When you craft an Mk1 armor using your existing Mk0, it "eats" up all equipment in the grid and it disappears forever.

Thank you for letting me know. I will look into it.

This is still an issue I just found out about today. Any info on a fix for this?

I hacked this in to regenerate mine after my modules got eaten by the mk1 upgrade.
This was my solution by modifying the mod's control.lua to insert a new regenerate command
1. unzip the mod in AppData/Roaming/Factorio/mods
2. modify control.lua
3. re-zip folder and delete the unzipped folder
4. Relaunch game and load save.
5. In game run /tinystart-regen

I hope this helps someone.

Add this to control.lua:

commands.add_command(
  "tinystart-regen",
  "Gives/equips TinyStart armor and regenerates its equipment (safe, no duplication).",
  function(cmd)
    local player = game.get_player(cmd.player_index)
    if not player then return end

    local chara = player.character or player.cutscene_character
    if not chara then
      player.print("[TinyStart] No character available (sandbox/cutscene).")
      return
    end

    local armor_inv = player.get_inventory(defines.inventory.character_armor)
    if not armor_inv then
      player.print("[TinyStart] No armor inventory available.")
      return
    end

    -- Get currently equipped armor (if any)
    local armor = armor_inv[1]
    local wearing_tiny = armor.valid_for_read and armor.name == "tiny-armor-mk0"

    -- If not wearing Tiny armor, create/equip it
    if not wearing_tiny then
      -- If another armor is equipped, move it to main inventory (or drop if full)
      if armor.valid_for_read then
        local main = player.get_main_inventory()
        local inserted = main and main.insert(armor)
        if not inserted or inserted == 0 then
          player.surface.spill_item_stack(player.position, armor, true, player.force, false)
        end
        armor.clear()
      end

      armor_inv.insert({ name = "tiny-armor-mk0", count = 1 })
      armor = armor_inv[1]
      player.print("[TinyStart] Equipped tiny-armor-mk0.")
    end

    if not armor.valid_for_read then
      player.print("[TinyStart] Failed to equip TinyStart armor.")
      return
    end

    -- Prevent duplication
    if armor.grid.count() > 0 then
      player.print("[TinyStart] Armor already has equipment; not regenerating.")
      return
    end

    genarmor(player, chara)
    player.print("[TinyStart] TinyStart equipment regenerated.")
  end
)