old_contents: """Determine dataset."""
  
  import mgz
  from mgz.util import Version
  
  
  def get_dataset_data(header):
      """Get dataset."""
      if header.version == Version.DE:
          return {
              'id': 100,
              'name': 'Definitive Edition',
              'version': header.game_version[4:]
          }
      sample = header.initial.players[0].attributes.player_stats
      if 'mod' in sample and sample.mod['id'] == 0 and sample.mod['version'] == '2':
          raise ValueError("invalid mod version")
      if 'mod' in sample and sample.mod['id'] > 0:
          return sample.mod
      if 'trickle_food' in sample and sample.trickle_food:
          return {
              'id': 1,
              'name': mgz.const.MODS.get(1),
              'version': '<5.7.2'
          }
      if header.version == Version.AOK:
          return {
              'id': 200,
              'name': 'Age of Kings',
              'version': '2.0a'
          }
      if header.version == Version.AOC10:
          return {
              'id': 0,
              'name': 'The Conquerors',
              'version': '1.0'
          }
      return {
          'id': 0,
          'name': 'The Conquerors',
          'version': '1.0c'
      }
  
new_contents: """Determine dataset."""
  
  import mgz
  from mgz.util import Version
  
  
  def get_dataset_data(header):
      """Get dataset."""
      if header.version == Version.DE:
          return {
              'id': 100,
              'name': 'Definitive Edition',
              'version': None
          }
      sample = header.initial.players[0].attributes.player_stats
      if 'mod' in sample and sample.mod['id'] == 0 and sample.mod['version'] == '2':
          raise ValueError("invalid mod version")
      if 'mod' in sample and sample.mod['id'] > 0:
          return sample.mod
      if 'trickle_food' in sample and sample.trickle_food:
          return {
              'id': 1,
              'name': mgz.const.MODS.get(1),
              'version': '<5.7.2'
          }
      if header.version == Version.AOK:
          return {
              'id': 200,
              'name': 'Age of Kings',
              'version': '2.0a'
          }
      if header.version == Version.AOC10:
          return {
              'id': 0,
              'name': 'The Conquerors',
              'version': '1.0'
          }
      return {
          'id': 0,
          'name': 'The Conquerors',
          'version': '1.0c'
      }
  
subject: remove improper de version