fix: Patch dunnings made after accounts were frozen

- Consider "Accounts Frozen Until" and Period Closing Voucher

erpnext/patches/v14_0/single_to_multi_dunning.py

@@ -7,7 +7,15 @@ def execute():
 	frappe.reload_doc("accounts", "doctype", "overdue_payment")
 	frappe.reload_doc("accounts", "doctype", "dunning")
 
-	all_dunnings = frappe.get_all("Dunning", filters={"docstatus": ("!=", 2)}, pluck="name")
+	filters = {"docstatus": ("!=", 2)}
+
+	can_edit_accounts_after = get_accounts_closing_date()
+	if can_edit_accounts_after:
+		# Get dunnings after the date when accounts were frozen/closed
+		filters["posting_date"] = (">", can_edit_accounts_after)
+
+	all_dunnings = frappe.get_all("Dunning", filters=filters, pluck="name")
+
 	for dunning_name in all_dunnings:
 		dunning = frappe.get_doc("Dunning", dunning_name)
 		if not dunning.sales_invoice:
@@ -47,3 +55,22 @@ def execute():
 			# so we reverse previous GL Entries that recorded the dunning amount at
 			# time of submission of the Dunning.
 			make_reverse_gl_entries(voucher_type="Dunning", voucher_no=dunning.name)
+
+
+def get_accounts_closing_date():
+	"""Get the date when accounts were frozen/closed"""
+	accounts_frozen_till = frappe.db.get_single_value(
+		"Accounts Settings", "acc_frozen_upto"
+	)  # always returns datetime.date
+
+	period_closing_date = frappe.db.get_value(
+		"Period Closing Voucher", {"docstatus": 1}, "posting_date", order_by="posting_date desc"
+	)
+
+	# Set most recent frozen/closing date as filter
+	if accounts_frozen_till and period_closing_date:
+		can_edit_accounts_after = max(accounts_frozen_till, period_closing_date)
+	else:
+		can_edit_accounts_after = accounts_frozen_till or period_closing_date
+
+	return can_edit_accounts_after