fix(regional): removed payment schedule validation in sales invoice for italy

[ljain112]

Issue: Payment Details are not mandatory for Italy e-Invoicing.

If Sales Return is created, the system automatically removes Payment Schedule rows causing the error.

Traceback

Traceback (most recent call last):

File "apps/frappe/frappe/[app.py](http://app.py/)", line 114, in application

response = frappe.api.handle(request)

^^^^^^^^^^^^^^^^^^^^^^^^^^

File "apps/frappe/frappe/api/__init__.py", line 49, in handle

data = endpoint(**arguments)

^^^^^^^^^^^^^^^^^^^^^

File "apps/frappe/frappe/api/[v1.py](http://v1.py/)", line 36, in handle_rpc_call

return frappe.handler.handle()

^^^^^^^^^^^^^^^^^^^^^^^

File "apps/frappe/frappe/[handler.py](http://handler.py/)", line 50, in handle

data = execute_cmd(cmd)

^^^^^^^^^^^^^^^^

File "apps/frappe/frappe/[handler.py](http://handler.py/)", line 86, in execute_cmd

return [frappe.call](http://frappe.call/)(method, **frappe.form_dict)

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

File "apps/frappe/frappe/__init__.py", line 1726, in call

return fn(*args, **newargs)

^^^^^^^^^^^^^^^^^^^^

File "apps/frappe/frappe/utils/typing_[validations.py](http://validations.py/)", line 31, in wrapper

return func(*args, **kwargs)

^^^^^^^^^^^^^^^^^^^^^

File "apps/frappe/frappe/desk/form/[save.py](http://save.py/)", line 37, in savedocs

doc.submit()

File "apps/frappe/frappe/utils/typing_[validations.py](http://validations.py/)", line 31, in wrapper

return func(*args, **kwargs)

^^^^^^^^^^^^^^^^^^^^^

File "apps/frappe/frappe/model/[document.py](http://document.py/)", line 1060, in submit

return self._submit()

^^^^^^^^^^^^^^

File "apps/frappe/frappe/model/[document.py](http://document.py/)", line 1043, in _submit

return [self.save](http://self.save/)()

^^^^^^^^^^^

File "apps/frappe/frappe/model/[document.py](http://document.py/)", line 342, in save

return self._save(*args, **kwargs)

^^^^^^^^^^^^^^^^^^^^^^^^^^^

File "apps/frappe/frappe/model/[document.py](http://document.py/)", line 395, in _save

[self.run](http://self.run/)_post_save_methods()

File "apps/frappe/frappe/model/[document.py](http://document.py/)", line 1143, in run_post_save_methods

[self.run](http://self.run/)_method("on_submit")

File "apps/frappe/frappe/model/[document.py](http://document.py/)", line 974, in run_method

out = Document.hook(fn)(self, args, *kwargs)

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

File "apps/frappe/frappe/model/[document.py](http://document.py/)", line 1334, in composer

return composed(self, method, args, *kwargs)

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

File "apps/frappe/frappe/model/[document.py](http://document.py/)", line 1318, in runner

add_to_return_value(self, f(self, method, args, *kwargs))

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

File "apps/erpnext/erpnext/regional/italy/[utils.py](http://utils.py/)", line 335, in sales_invoice_on_submit

frappe.throw(_("Please set the Payment Schedule"), title=_("E-Invoicing Information Missing"))

File "apps/frappe/frappe/__init__.py", line 603, in throw

msgprint(

File "apps/frappe/frappe/__init__.py", line 568, in msgprint

raiseexception()

File "apps/frappe/frappe/__init__.py", line 519, in raiseexception

raise exc

frappe.exceptions.ValidationError: Please set the Payment Schedule

We are modifiying "DatiPagamento" in xml.
Documentation: https://www.fatturapa.gov.it/export/documenti/Specifiche_tecniche_del_formato_FatturaPA_V1.3.2.pdf

Closes: #44658
Frappe Support Issue: https://support.frappe.io/helpdesk/tickets/29505