Unselect other selected items if I selected "None" in multiple select

Hi good afternoon, Im new to ODK and Im sorry for this newbie question.

1. What is the issue? Please be detailed.
I just want to unselect a selected options if I select "None"


Thank you :slight_smile:

Hi @Melvin_Managbanag

Welcome to the GetODK Community and forum, when you get a chance please introduce yourself.

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Hi @Ronald_Munjoma

Thank you Sir :slight_smile: I was able to solve my problem with the constraint

if(selected(${item_name},"None"), count-selected(.)=1, true())