Can't delete functions

Can't delete functions

I am trying to delete the following forms from  https://creator.zoho.com/essistmgmt/assets/edit/function/#

  • udf_telco_service_order.temp_mandatory_inherit_from_parent_order
  • udf_telco_service_order.temp_optional_inherit_from_parent
I get the following error "Error:undefined"

I was able to delete other functions except those 2. Can you please remove?