I'm trying to set a formula that uses the Title field which was renamed. But when I save the calculated field the SPO shows an error telling me that I'm using a field that does not exist (!!!).
I couldn't reproduce this issue in SharePoint Online List.
- Renamed the [Title] column to [Cal-Title] and filled in with dummy values
- The list already has a column named [Countries] with Country Names
- Created a Calculated column, named [CalcOfRenamedTitle], with the following formula.
- The formula outputs the expected calculated values without any issues. See the screenshot below