Table maintenance events - Deleting the entries

Hi Experts,

My table has a field called 'LOCNO'. I want to write an event to make sure the table entry is not deleted when the value of LOCNO is 'Z001'.

For this I wrote a an EVENT 03 with following code block.

IF zmpts_minmax_rul-locno = 'Z001'.
    MESSAGE 'default row cannot be deleted, please change the values if necessary ' TYPE 'E'.
    CLEAR zmpts_minmax_rul.
  ENDIF.

But I observed that the value of zmpts_minmax_rul-locno will always be the value of LOCNO in the last row of the table. I want zmpts_minmax_rul-locno to be populated with the entry choosen for deletion.

Please help.