fix: negative stock error

(cherry picked from commit 6d513e2)

erpnext/stock/stock_ledger.py

@@ -1050,7 +1050,7 @@ def update_bin(self):
 			frappe.db.set_value("Bin", bin_name, updated_values, update_modified=True)
 
 
-def get_previous_sle_of_current_voucher(args, exclude_current_voucher=False):
+def get_previous_sle_of_current_voucher(args, operator="<", exclude_current_voucher=False):
 	"""get stock ledger entries filtered by specific posting datetime conditions"""
 
 	args["time_format"] = "%H:%i:%s"
@@ -1076,13 +1076,13 @@ def get_previous_sle_of_current_voucher(args, exclude_current_voucher=False):
 				posting_date < %(posting_date)s or
 				(
 					posting_date = %(posting_date)s and
-					time_format(posting_time, %(time_format)s) < time_format(%(posting_time)s, %(time_format)s)
+					time_format(posting_time, %(time_format)s) {operator} time_format(%(posting_time)s, %(time_format)s)
 				)
 			)
 		order by timestamp(posting_date, posting_time) desc, creation desc
 		limit 1
 		for update""".format(
-			voucher_condition=voucher_condition
+			operator=operator, voucher_condition=voucher_condition
 		),
 		args,
 		as_dict=1,
@@ -1375,7 +1375,7 @@ def get_stock_reco_qty_shift(args):
 			stock_reco_qty_shift = flt(args.actual_qty)
 	else:
 		# reco is being submitted
-		last_balance = get_previous_sle_of_current_voucher(args, exclude_current_voucher=True).get(
+		last_balance = get_previous_sle_of_current_voucher(args, "<=", exclude_current_voucher=True).get(
 			"qty_after_transaction"
 		)