code: def check_version_info(conn, version_table, expected_version):
      
  
      # Read the version out of the table
      version_from_table = conn.execute(
          sa.select((version_table.c.version,)),
      ).scalar()
  
      # A db without a version is considered v0
      if version_from_table is None:
          version_from_table = 0
  
      # Raise an error if the versions do not match
      if (version_from_table != expected_version):
          raise AssetDBVersionError(db_version=version_from_table,
                                    expected_version=expected_version)
docs: Checks for a version value in the version table.
  
      Parameters
      ----------
      conn : sa.Connection
          The connection to use to perform the check.
      version_table : sa.Table
          The version table of the asset database
      expected_version : int
          The expected version of the asset database
  
      Raises
      ------
      AssetDBVersionError
          If the version is in the table and not equal to ASSET_DB_VERSION.