Delete is not performed after an insertion - postgres - postgresql

Question

I'm writing a function where I can store specific fields from a table before to delete the record, to keep an historical.
The insertion is working well, but the Delete sometimes is returning Delete 0, even if I have hardcode the id field that I want to delete.
This is my function:
create or replace function deletefromtable(_schema text, _table text, _filter text, _userid int)
returns json as
$func$
DECLARE _record json;
DECLARE target text;
DECLARE mykey TEXT;
DECLARE newvalue TEXT;
DECLARE oldvalue TEXT;
DECLARE columnname TEXT;
begin
SET session_replication_role = replica;
execute format ('select row_to_json(t) from (select * from ' || _schema ||'.' || _table || ' WHERE ' || _filter || ' ) t') into _record;
raise notice 'record: %', _record;
FOR target IN SELECT col from track_settings(_table) LOOP
with vw_listing (new_record) as ( values
(_record::jsonb)
)
SELECT (new_record ->> target)::text INTO newvalue
FROM vw_listing LIMIT 1;
raise notice 'newvalue: %', newvalue;
execute format ('insert into track_history (created_at, table_name, column_name, table_id, user_id, new_val, old_val, pg_user)
values (''' || Now() || ''', ''' || _table || ''', ''' || target || ''', ''' || _filter || ''' ,' || _userid || ', null, ''' || newvalue || ''', current_user )');
END LOOP;
execute ('DELETE FROM public.user WHERE id = 1 ;'); -- THIS LINE IS NOT EXECUTED
SET session_replication_role = default;
RETURN _record;
COMMIT;
end
$func$ language plpgsql;
I tried to enable SET session_replication_role = replica; or SET session_replication_role = default; but is still not working.
The function hasn't any errors and is executing all the statements.
Can someone help me to fix it?