I'm trying to update a SharePoint choice field with null value. If the choice column already has value then I'm trying to reset with null value based on certain conditions in the form. I've tried using Blank() function and turned on experimental features but that doesn't seem to work for choice column but only for text inputs.
Say my form has 2 choice columns. Based on the value of the first choice column selection I want to update the value of the 2nd choice column in SharePoint. This is how my Patch function looks on click of submit button
When creating a new form, suppose I select Yes for both the choice columns, I can see the value getting saved properly. However when I edit the item, if I select No in the first choice, the 2nd choice column is not set to blank after I save the data.