To where do you want to update your blank value?
If it's to a SharePoint list, please check if the item "column" isn't a required field.
It's not required field. when i submit form first time i can save it as null or with any data. but when i try to update it with null value. it does not allow me to do it. it save previous value, if i try to save null value other wise it save updated data
I did some research on the form and I see that this issue is common there is a workaround that should work.
Could you check the link below, it would "reset" the data field and should make it able to submit it with a 0.
Please let me know if it worked!
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