encounter.lua script for my mod with error

-- A basic encounter script skeleton you can copy and modify for your own creations.

music = "omoritheme" --Either OGG or WAV. Extension is added automatically. Uncomment for custom music.
encountertext = "Omori stands there." --Modify as necessary. It will only be read out in the action select screen.
nextwaves = {"bullettest_chaserorb"}
wavetimer = 4.0
arenasize = {155, 130}

deathmusic = "mytime"

autolinebreak = true

enemies = {
"poseur"
}

enemypositions = {
{0, 0}
}

-- A custom list with attacks to choose from. Actual selection happens in EnemyDialogueEnding(). Put here in case you want to use it.
possible_attacks = {"bullettest_bouncy", "bullettest_chaserorb", "bullettest_touhou"}

function EncounterStarting()
    -- If you want to change the game state immediately, this is the place.
    currentdialogue = {"It's over.", "Oyasumi."}
    Inventory.AddCustomItems({"Broken Violin"}, {3})
    Inventory.SetInventory({"Broken Violin", "Violin"})
end

function EnemyDialogueStarting()
    -- Good location for setting monster dialogue depending on how the battle is going.
end

function EnemyDialogueEnding()
    -- Good location to fill the 'nextwaves' table with the attacks you want to have simultaneously.
    nextwaves = { possible_attacks[math.random(#possible_attacks)] }
end

function DefenseEnding() --This built-in function fires after the defense round ends.
    encountertext = RandomEncounterText() --This built-in function gets a random encounter text from a random enemy.
end

function HandleSpare()
    State("ENEMYDIALOGUE")
end

function HandleItem(ItemID)
    if ItemID == "BROKEN VIOLIN" then
    Inventory.AddCustomItems ({Violin}, {1})
    BattleDialog({"You fix the violin."})
    elseif ItenID == "VIOLIN"
    Inventory.SetAmount(99999999)
    BattleDialog({"You get ready to play the final duet with MARI's spirit."})
    end
end

Player.maxhp = 300
Player.hp = 300
Player.atk = 46
Player.def = 72
Player.lv = 1
Player.name = "Sunny"