If you aware of SAP 1420281. The function &SAP_EDIT has been disable by SAP. But, still, you proceed to edit the table using the below steps,
1. Execute transaction code SE16N. As an example, you want to edit the table USR02. On the transaction code field, type /h and press Enter. You have now switch on the debugging mode.
2. You will see the notification “Debugging Switched On” , click on it to open the ABAP debugger.
3. Enter the value GD-SAPEDIT and GD-EDIT on the variable column and press Enter. Then, click to switch mode (pencil icon) and enter X on the Value column.
4. Press F8 and you can start do the editing.
