turn1 = Turn.find_by(number: 1)
if turn1 && turn1.game_state.is_a?(Hash) && turn1.game_state.has_key?('game_state')
  puts "Normalizing Turn 1 (ID: #{turn1.id})..."
  turn1.update!(game_state: turn1.game_state['game_state'])
  puts "Turn 1 optimized."
end

# 不整合のある後続ターンを削除
Turn.where('number > 1').destroy_all
puts "Cleared subsequent turns."