Note After you type the equal sign (=) in a calculated column, you can paste a column reference simply by clicking the cell in that column that belongs to the current row. However, if the column is of a data type that does not support calculations, if you are attempting to select a cell in a different row, or select more than one cell, the list will not paste the column reference in the formula.
Click OK to commit changes and resolve conflicts and errors.
Important Formulas can only be used in columns with the data type Calculated. You cannot change the data type of a column to Calculated.