fix: negative batch issue (#38688)

erpnext/stock/doctype/serial_and_batch_bundle/serial_and_batch_bundle.py

@@ -709,6 +709,7 @@ class SerialandBatchBundle(Document):
 					"item_code": self.item_code,
 					"warehouse": self.warehouse,
 					"batch_no": batches,
+					"consider_negative_batches": True,
 				}
 			)
 		)
@@ -719,6 +720,9 @@ class SerialandBatchBundle(Document):
 		available_batches = get_available_batches_qty(available_batches)
 		for batch_no in batches:
 			if batch_no not in available_batches or available_batches[batch_no] < 0:
+				if flt(available_batches.get(batch_no)) < 0:
+					self.validate_negative_batch(batch_no, available_batches[batch_no])
+
 				self.throw_error_message(
 					f"Batch {bold(batch_no)} is not available in the selected warehouse {self.warehouse}"
 				)
@@ -1491,7 +1495,8 @@ def get_auto_batch_nos(kwargs):
 			available_batches, stock_ledgers_batches, pos_invoice_batches, sre_reserved_batches
 		)
 
-	available_batches = list(filter(lambda x: x.qty > 0, available_batches))
+	if not kwargs.consider_negative_batches:
+		available_batches = list(filter(lambda x: x.qty > 0, available_batches))
 
 	if not qty:
 		return available_batches

erpnext/stock/doctype/stock_entry/test_stock_entry.py

@@ -1733,6 +1733,45 @@ class TestStockEntry(FrappeTestCase):
 		self.assertFalse(doc.is_enqueue_action())
 		frappe.flags.in_test = True
 
+	def test_negative_batch(self):
+		item_code = "Test Negative Batch Item - 001"
+		make_item(
+			item_code,
+			{"has_batch_no": 1, "create_new_batch": 1, "batch_naming_series": "Test-BCH-NNS.#####"},
+		)
+
+		se1 = make_stock_entry(
+			item_code=item_code,
+			purpose="Material Receipt",
+			qty=100,
+			target="_Test Warehouse - _TC",
+		)
+
+		se1.reload()
+
+		batch_no = get_batch_from_bundle(se1.items[0].serial_and_batch_bundle)
+
+		se2 = make_stock_entry(
+			item_code=item_code,
+			purpose="Material Issue",
+			batch_no=batch_no,
+			qty=10,
+			source="_Test Warehouse - _TC",
+		)
+
+		se2.reload()
+
+		se3 = make_stock_entry(
+			item_code=item_code,
+			purpose="Material Receipt",
+			qty=100,
+			target="_Test Warehouse - _TC",
+		)
+
+		se3.reload()
+
+		self.assertRaises(frappe.ValidationError, se1.cancel)
+
 
 def make_serialized_item(**args):
 	args = frappe._dict(args)