Hey,
Thanks for reaching out! If the row has already run, you can simply click on the row and extract the value you need to add it as a column. You can find more details on how to do this in this video: Loom Example.
However, I want to point out that you shouldn’t delete the waterfall from the table itself. Always remove it from the waterfall menu; otherwise, it can cause the column to break, as you’ve noticed.
Let me know if you need any further assistance! 😊