Hi @marova.alesya, thanks for your questions.
Such functionality can be achieved by using constraints on the “Add List of Markers” action.
In your case, after the user click the button to select a certain category, please use the "Remove All markers " action, then use again the “Add List of Markers” action with required constraints applied.
Hope the provided advice helps. Please let us know if there is anything else that we can help with about our plugin.
Happy Holidays !!!
Regards,
Zeroqode Support Team