I have a combobox on my form. When I edit a SharePoint item the form is displaying the selected items correctly but the dropdown allows me to select those items again. Therefore the same record is displayed twice in the box but only the newly selected records are saved back to the list.
How do I prevent selected items from being selected again?
What is the column type of this column? At first, I thought it is a multiple value enabled Person and Group field, but I just tested and got the different result.
For example, for below multiple value enabled Person and Group field, I have "Mona" already in existing item. But after I search for Mona again, and select this person, it will be deleted as 2nd screenshot shows.
Did you use other data source as the options for this combo box? If so, how did you set this?
Please also share the Items property and other related settings of this combo box control.
Community Support Team _ Mona Li If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.