If you wish to clear the overdue tickets in your helpdesk as a one-time activity, you can create an automation rule under time triggers. Here's how you can configure it.
Login to your Freshdesk account as an administrator.
Navigate to Admin from the menu. Under Workflows, click on Automations.
Choose the Tickets tab and then Time Triggers.
Click on the New Rule button and provide a rule name.
Under the On tickets with these properties: section, select In Tickets, if Hours since ticket overdue, Greater than 0.
Under the Perform these actions: section, select Delete the ticket option from the dropdown.
Click on Preview and Save and then Save and enable.
Ensure to TURN OFF this rule once overdue tickets are deleted from your queue.
Note : This automation rule will run every hour and only process tickets updated in the last 30 days.
Please reach out to firstname.lastname@example.org if you require further assistance.