Management of favorites (addition, deletion)

I use SoftR with an Airtable base.
My visitor is a connected visitor. I give the possibility of saving as “favorites” the “products” that I present on my site. To do this, I added a button that adds the user’s email to a “favorite” field in my “product” record.
Then the user finds his list of “favorites” and can delete one of these “favorites”. Unfortunately, all the values ​​(user emails) in my “favorite” field are deleted.
Is it possible to only delete the email value of the user performing the deletion ? Should I do otherwise ?
I hope to be clear…