new_contents: """
  	Removes duplicate entries created in 
  """
  import webnotes
  def execute():
  	res = webnotes.conn.sql("""\
  		SELECT a.name
  		FROM
  			`tabTable Mapper Detail` a,
  			`tabTable Mapper Detail` b
  		WHERE
  			a.parent = b.parent AND
  			a.from_table = b.from_table AND
  			a.to_table = b.to_table AND
  			a.from_field = b.from_field AND
  			a.to_field = b.to_field AND
  			a.name < b.name""")
  	if res and len(res)>0:
  		name_string = ", ".join(["'" + str(r[0]) + "'" for r in res])
  		res = webnotes.conn.sql("""\
  			DELETE FROM `tabTable Mapper Detail`
  			WHERE name IN (%s)""" % name_string)
  
subject: Patch to remove duplicate entries created due to change in validation_logic in Table Mapper Detail for the following doctypes: * Delivery Note-Receivable Voucher * Purchase Order-Purchase Voucher * Sales Order-Receivable Voucher