How to delete old form submissions

I want to delete old form submissions- but i do not want to delete the form. Please advise.

Please check this guide that will help you deleting the submissions on your form, note that you may filter them by time range and delete just the submissions from that range: https://www.jotform.com/help/377-How-to-Delete-Form-Submission-Data 

If you have questions, let us know.