diff --git a/erpnext/stock/doctype/serial_and_batch_bundle/serial_and_batch_bundle.py b/erpnext/stock/doctype/serial_and_batch_bundle/serial_and_batch_bundle.py
index 3de5c7417a7..db902d1b3f0 100644
--- a/erpnext/stock/doctype/serial_and_batch_bundle/serial_and_batch_bundle.py
+++ b/erpnext/stock/doctype/serial_and_batch_bundle/serial_and_batch_bundle.py
@@ -27,6 +27,7 @@ from frappe.utils import (
 )
 from frappe.utils.csvutils import build_csv_response
 
+from erpnext.stock.doctype.purchase_receipt_item.purchase_receipt_item import PurchaseReceiptItem
 from erpnext.stock.serial_batch_bundle import (
 	BatchNoValuation,
 	SerialNoValuation,
@@ -2152,9 +2153,14 @@ def get_reference_serial_and_batch_bundle(child_row):
 
 
 @frappe.whitelist()
-def add_serial_batch_ledgers(entries, child_row, doc, warehouse, do_not_save=False) -> object:
-	if isinstance(child_row, str):
-		child_row = frappe._dict(parse_json(child_row))
+def add_serial_batch_ledgers(
+	entries: list | str,
+	child_row: PurchaseReceiptItem | dict | str,
+	doc: Document | dict | str,
+	warehouse: str | None = None,
+	do_not_save: bool = False,
+):
+	child_row = parse_json(child_row)
 
 	if isinstance(entries, str):
 		entries = parse_json(entries)
@@ -2186,7 +2192,9 @@ def create_serial_batch_no_ledgers(
 	if parent_doc.get("doctype") == "Stock Entry":
 		warehouse = warehouse or child_row.s_warehouse or child_row.t_warehouse
 
-	posting_datetime = combine_datetime(parent_doc.get("posting_date"), parent_doc.get("posting_time"))
+	posting_datetime = combine_datetime(
+		parent_doc.get("posting_date") or today(), parent_doc.get("posting_time") or nowtime()
+	)
 
 	doc = frappe.get_doc(
 		{
@@ -2303,7 +2311,9 @@ def update_serial_batch_no_ledgers(bundle, entries, child_row, parent_doc, wareh
 		)
 
 	doc.voucher_detail_no = child_row.name
-	doc.posting_datetime = combine_datetime(parent_doc.get("posting_date"), parent_doc.get("posting_time"))
+	doc.posting_datetime = combine_datetime(
+		parent_doc.get("posting_date") or today(), parent_doc.get("posting_time") or nowtime()
+	)
 
 	doc.warehouse = warehouse or doc.warehouse
 	doc.set("entries", [])