diff --git a/erpnext/accounts/doctype/pos_invoice/pos_invoice.py b/erpnext/accounts/doctype/pos_invoice/pos_invoice.py
index e542d3c..9b0b3ec 100644
--- a/erpnext/accounts/doctype/pos_invoice/pos_invoice.py
+++ b/erpnext/accounts/doctype/pos_invoice/pos_invoice.py
@@ -11,7 +11,6 @@
 from erpnext.accounts.doctype.payment_request.payment_request import make_payment_request
 from erpnext.accounts.doctype.sales_invoice.sales_invoice import (
 	SalesInvoice,
-	get_bank_cash_account,
 	get_mode_of_payment_info,
 	update_multi_mode_option,
 )
@@ -208,7 +207,6 @@
 		self.validate_stock_availablility()
 		self.validate_return_items_qty()
 		self.set_status()
-		self.set_account_for_mode_of_payment()
 		self.validate_pos()
 		self.validate_payment_amount()
 		self.validate_loyalty_transaction()
@@ -643,11 +641,6 @@
 			update_multi_mode_option(self, pos_profile)
 			self.paid_amount = 0
 
-	def set_account_for_mode_of_payment(self):
-		for pay in self.payments:
-			if not pay.account:
-				pay.account = get_bank_cash_account(pay.mode_of_payment, self.company).get("account")
-
 	@frappe.whitelist()
 	def create_payment_request(self):
 		for pay in self.payments:
diff --git a/erpnext/accounts/doctype/sales_invoice/sales_invoice.py b/erpnext/accounts/doctype/sales_invoice/sales_invoice.py
index cc19650..c381b8a 100644
--- a/erpnext/accounts/doctype/sales_invoice/sales_invoice.py
+++ b/erpnext/accounts/doctype/sales_invoice/sales_invoice.py
@@ -421,7 +421,8 @@
 		self.calculate_taxes_and_totals()
 
 	def before_save(self):
-		set_account_for_mode_of_payment(self)
+		self.set_account_for_mode_of_payment()
+		self.set_paid_amount()
 
 	def on_submit(self):
 		self.validate_pos_paid_amount()
@@ -712,9 +713,6 @@
 			):
 				data.sales_invoice = sales_invoice
 
-	def on_update(self):
-		self.set_paid_amount()
-
 	def on_update_after_submit(self):
 		if hasattr(self, "repost_required"):
 			fields_to_check = [
@@ -745,6 +743,11 @@
 		self.paid_amount = paid_amount
 		self.base_paid_amount = base_paid_amount
 
+	def set_account_for_mode_of_payment(self):
+		for payment in self.payments:
+			if not payment.account:
+				payment.account = get_bank_cash_account(payment.mode_of_payment, self.company).get("account")
+
 	def validate_time_sheets_are_submitted(self):
 		for data in self.timesheets:
 			if data.time_sheet:
@@ -2113,12 +2116,6 @@
 	return make_return_doc("Sales Invoice", source_name, target_doc)
 
 
-def set_account_for_mode_of_payment(self):
-	for data in self.payments:
-		if not data.account:
-			data.account = get_bank_cash_account(data.mode_of_payment, self.company).get("account")
-
-
 def get_inter_company_details(doc, doctype):
 	if doctype in ["Sales Invoice", "Sales Order", "Delivery Note"]:
 		parties = frappe.db.get_all(