fix: not able to submit LCV entry (#42303)

erpnext/accounts/doctype/journal_entry/test_journal_entry.py

@@ -481,6 +481,43 @@ class TestJournalEntry(unittest.TestCase):
 			for field in self.fields:
 				self.assertEqual(self.expected_gle[i][field], gl_entries[i][field])
 
+	def test_negative_debit_and_credit_with_same_account_head(self):
+		from erpnext.accounts.general_ledger import process_gl_map
+
+		# Create JV with defaut cost center - _Test Cost Center
+		frappe.db.set_single_value("Accounts Settings", "merge_similar_account_heads", 0)
+
+		jv = make_journal_entry("_Test Bank - _TC", "_Test Bank - _TC", 100 * -1, save=True)
+		jv.append(
+			"accounts",
+			{
+				"account": "_Test Cash - _TC",
+				"debit": 100 * -1,
+				"credit": 100 * -1,
+				"debit_in_account_currency": 100 * -1,
+				"credit_in_account_currency": 100 * -1,
+				"exchange_rate": 1,
+			},
+		)
+		jv.flags.ignore_validate = True
+		jv.save()
+
+		self.assertEqual(len(jv.accounts), 3)
+
+		gl_map = jv.build_gl_map()
+
+		for row in gl_map:
+			if row.account == "_Test Cash - _TC":
+				self.assertEqual(row.debit_in_account_currency, 100 * -1)
+				self.assertEqual(row.credit_in_account_currency, 100 * -1)
+
+		gl_map = process_gl_map(gl_map, False)
+
+		for row in gl_map:
+			if row.account == "_Test Cash - _TC":
+				self.assertEqual(row.debit_in_account_currency, 100)
+				self.assertEqual(row.credit_in_account_currency, 100)
+
 
 def make_journal_entry(
 	account1,

erpnext/accounts/general_ledger.py

@@ -311,6 +311,18 @@ def check_if_in_list(gle, gl_map):
 def toggle_debit_credit_if_negative(gl_map):
 	for entry in gl_map:
 		# toggle debit, credit if negative entry
+		if flt(entry.debit) < 0 and flt(entry.credit) < 0 and flt(entry.debit) == flt(entry.credit):
+			entry.credit *= -1
+			entry.debit *= -1
+
+		if (
+			flt(entry.debit_in_account_currency) < 0
+			and flt(entry.credit_in_account_currency) < 0
+			and flt(entry.debit_in_account_currency) == flt(entry.credit_in_account_currency)
+		):
+			entry.credit_in_account_currency *= -1
+			entry.debit_in_account_currency *= -1
+
 		if flt(entry.debit) < 0:
 			entry.credit = flt(entry.credit) - flt(entry.debit)
 			entry.debit = 0.0