diff --git a/erpnext/accounts/doctype/payment_reconciliation/payment_reconciliation.py b/erpnext/accounts/doctype/payment_reconciliation/payment_reconciliation.py
index df777f0..d574cd7 100644
--- a/erpnext/accounts/doctype/payment_reconciliation/payment_reconciliation.py
+++ b/erpnext/accounts/doctype/payment_reconciliation/payment_reconciliation.py
@@ -363,12 +363,6 @@
 				payment_details = self.get_payment_details(row, dr_or_cr)
 				reconciled_entry.append(payment_details)
 
-				# if payment_details.difference_amount and row.reference_type not in [
-				# 	"Sales Invoice",
-				# 	"Purchase Invoice",
-				# ]:
-				# 	self.make_difference_entry(payment_details)
-
 		if entry_list:
 			reconcile_against_document(entry_list, skip_ref_details_update_for_pe)
 
diff --git a/erpnext/controllers/accounts_controller.py b/erpnext/controllers/accounts_controller.py
index f72ae81..611eca6 100644
--- a/erpnext/controllers/accounts_controller.py
+++ b/erpnext/controllers/accounts_controller.py
@@ -972,9 +972,12 @@
 		"""
 		Make Exchange Gain/Loss journal for Invoices and Payments
 		"""
-		# Cancelling existing exchange gain/loss journals is handled in on_cancel event in accounts/utils.py
+		# Cancelling existing exchange gain/loss journals is handled during the `on_cancel` event.
+		# see accounts/utils.py:cancel_exchange_gain_loss_journal()
 		if self.docstatus == 1:
 			if self.get("doctype") == "Journal Entry":
+				# 'args' is populated with exchange gain/loss account and the amount to be booked.
+				# These are generated by Sales/Purchase Invoice during reconciliation and advance allocation.
 				if args:
 					for arg in args:
 						if arg.get("difference_amount", 0) != 0 and arg.get("difference_account"):
@@ -1035,6 +1038,7 @@
 									"exchange_rate": 1,
 									"cost_center": erpnext.get_default_cost_center(self.company),
 									# TODO: figure out a way to pass reference
+									# throws 'Journal Entry doesn't have {account} or doesn't have matched account'
 									# "reference_type": self.doctype,
 									# "reference_name": self.name,
 									# "reference_detail_no": arg.idx,
@@ -1049,7 +1053,7 @@
 							journal_entry.submit()
 
 			if self.get("doctype") == "Payment Entry":
-				# For Payment Entry, exchange_gain_loss field in the `reference` table is the trigger for journal creation
+				# For Payment Entry, exchange_gain_loss field in the `references` table is the trigger for journal creation
 				gain_loss_to_book = [x for x in self.references if x.exchange_gain_loss != 0]
 				booked = []
 				if gain_loss_to_book: