I found solution
do $$
declare
v_array integer[] := array[1,2,3,4,5];
v_array2 integer[];
v_delete_elements integer :=2;
v_new_index integer;
begin
v_new_index := array_lower(v_array, 1) + v_delete_elements;
v_array2 := array_fill(v_array[v_new_index], ARRAY[1], ARRAY[v_new_index])
|| v_array[v_new_index+1:array_upper(v_array, 1)];
raise notice '%', v_array2;
end;
$$
NOTICE: [3:5]={3,4,5}
--
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