Ghost Sheet formula

[BradleyREM]

Weird bug. I'm trying to simply add the HERE() formula to calculate the initial value of LatLong. I get this error:

Column Name 'LatLong' in Schema 'Observations_Schema' of Column Type 'LatLong' has a 'Sheet Formula' so the column is being marked 'Read Only'.

But there are ZERO formulas anywhere in the source Google Sheet. I verified this by selecting the entire sheet, selecting View and Formulas.

I have made many apps and never had this problem. Advanced thanks for any ideas.

[JuneCorpuz]

Have you checked if there is an expression in 'Spreadsheet formula'?

[Markus_Malessa]

If there is a sheet formula does the column setting in Appsheet reflect that?

Did you double check the Spreadsheet to make sure that is not a calculated column in the spreadsheet? If by chance you are using a separate Lat column and Long column did you by chance combine them in the LatLong column by using concatenate formula in the spreadsheet?