work area is not too long enough SAP ABAP

You may receive this error in SAP ABAP workbench.

Updating ZTABLE is throwing this error.

Change INTERNAL_TABLE structure to ZTABLE structure.

data: INTERNAL_TABLE like table of ZTABLE,
         WORK_AREA like line of INTERNAL_TABLE.

modify ZTABLE from table INTERNAL_TABLE .
insert ZTABLE from WORK_AREA.