fix: field can't be a dict

erpnext/accounts/general_ledger.py

@@ -766,7 +766,7 @@ def validate_against_pcv(is_opening, posting_date, company):
 		)
 
 	last_pcv_date = frappe.db.get_value(
-		"Period Closing Voucher", {"docstatus": 1, "company": company}, {"MAX": "period_end_date"}
+		"Period Closing Voucher", {"docstatus": 1, "company": company}, [{"MAX": "period_end_date"}]
 	)
 
 	if last_pcv_date and getdate(posting_date) <= getdate(last_pcv_date):

erpnext/stock/doctype/packing_slip/packing_slip.py

@@ -174,7 +174,7 @@ class PackingSlip(StatusUpdater):
 		return (
 			cint(
 				frappe.db.get_value(
-					"Packing Slip", {"delivery_note": self.delivery_note, "docstatus": 1}, {"MAX": "to_case_no"}
+					"Packing Slip", {"delivery_note": self.delivery_note, "docstatus": 1}, [{"MAX": "to_case_no"}]
 				)
 			)
 			+ 1