Validity of Modified Row and Column Definitions
If you delete a column or row definition from a statement definition section and modify it, you can only add it back to the statement definition section if the modified component passes the validations for the section. For example, all data type row definitions must have the same setting for the Enable Level of Detail Rollup check box. If you remove a row definition from a section, change the row definition so that it no longer has the same setting as the other row definitions in the section, the modified row definition cannot be inserted back into the section because it is no longer valid for the section.