Can't Edit in App, despite Spreadsheet having NO formulas

[David_Ames]

Hello,

I am trying to set columns to "Editable" in the AppSheet editor.  I continuously get an error message saying "Column Name 'WO 2' in Schema 'Chart 5s 2_Schema' of Column Type 'Text' has a 'Sheet Formula' so the column is being marked 'Read Only'."

There are NO formulas anywhere in the spreadsheet.

Can anyone help?  Thanks.