Support for Wikitude Software Development Kit and tools is coming to an end. All the details can be found here.
Kindly note that no new topics can be started on the forum from 21.09.2023. Also, some of the FAQs here (especially license related ones) might become inaccurate.
How to remove existing POIs and replace with new ones?
What you could do is destroy these objects (the POIs) by calling the destroy method. You can find further details here.