If one of your properties appears as two separate listings on your website, you are seeing a duplicate listing page on the website. Your PMS listing is fine.
Why this happens. The same property was imported into the site twice. Nothing you did caused it.
What to do. Contact support with the property name or links to both pages. Support removes the extra copy and keeps the correct listing in place, so the property is back to a single listing. No listing details, photos, or pricing are lost, and the correct listing is untouched. There is nothing to delete or re-add in your PMS.
If the duplicate reappears, or anything looks off on that property afterward, reply to the same ticket so support can take another look.