How to make row deletion impossible?

Hello experts,
I have an editable ALV grid with the following data:
ACCOUNT DESCRIPTION TAX
1000200 revenue A0
1000100 cost V2
I want to make the deletion of second row impossible. (I dont want to disable the delete row button)
How do I achieve this?
Thanks,
Yuvaraj

DATA pt_exclude1 TYPE ui_functions.
 perform exclude_tb_functions CHANGING pt_exclude1.
*--e.g. initial sorting criteria, initial filtering criteria, excluding
 --functions
 CALL METHOD gr_alvgrid->set_table_for_first_display
 EXPORTING
 I_BUFFER_ACTIVE =
 I_CONSISTENCY_CHECK =
 I_STRUCTURE_NAME =
 IS_VARIANT =
 I_SAVE =
 I_DEFAULT = 'X'
 is_layout = gs_layout
 IS_PRINT =
 IT_SPECIAL_GROUPS =
 IT_TOOLBAR_EXCLUDING = pt_exclude1
 IT_HYPERLINK = ls_hyperlink
 CHANGING
 it_outtab = itab[]
 it_fieldcatalog = gt_fieldcat
 IT_SORT =
 IT_FILTER =
 EXCEPTIONS
 invalid_parameter_combination = 1
 program_error = 2
 too_many_lines = 3
 OTHERS = 4 .
 IF sy-subrc <> 0.
 --Exception handling
 ENDIF.
*& Form exclude_tb_functions
FORM exclude_tb_functions CHANGING pt_exclude TYPE ui_functions .
DATA ls_exclude TYPE ui_func.
ls_exclude = cl_gui_alv_grid=>MC_FC_LOC_COPY .
APPEND ls_exclude TO pt_exclude.
ls_exclude = cl_gui_alv_grid=>MC_FC_LOC_COPY_ROW .
APPEND ls_exclude TO pt_exclude.
ls_exclude = cl_gui_alv_grid=>MC_FC_LOC_CUT .
APPEND ls_exclude TO pt_exclude.
 ls_exclude = cl_gui_alv_grid=>MC_FC_LOC_DELETE_ROW .
APPEND ls_exclude TO pt_exclude.
ls_exclude = cl_gui_alv_grid=>MC_FC_LOC_INSERT_ROW .
APPEND ls_exclude TO pt_exclude.
ls_exclude = cl_gui_alv_grid=>MC_FC_LOC_MOVE_ROW .
APPEND ls_exclude TO pt_exclude.
ls_exclude = cl_gui_alv_grid=>MC_FC_LOC_PASTE .
APPEND ls_exclude TO pt_exclude.
ls_exclude = cl_gui_alv_grid=>MC_FC_LOC_PASTE_NEW_ROW .
APPEND ls_exclude TO pt_exclude.
ls_exclude = cl_gui_alv_grid=>MC_FC_LOC_UNDO .
APPEND ls_exclude TO pt_exclude.
ls_exclude = cl_gui_alv_grid=>MC_FC_LOC_APPEND_ROW .
APPEND ls_exclude TO pt_exclude.
ENDFORM . "exclude_tb_functions

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