Group multiple query by row number mssql

row_num	Naziv	J.M.	Količina	Izlaz
1	AJVAR	Kilogram	17.51	
2	BIBER	Kilogram	2.50	
3	BIJELI LUK GRANULE	Kilogram	17.25	

55	VEGETA	Kilogram	0.00	
56	VRHNJE ZA KUHANJE	Litar	0.00	
1			0.00	SIS CEVAP
2			0.00	SREDNJI CEVAP
3			0.00	VELIKI CEVAP

WITH cteCombined AS (
  select  ROW_NUMBER() OVER (ORDER BY naziv) row_num,
  naziv as [Naziv], jedinica_mjere [J.M.], sum(kolicina) as [Kolicina], _
        '' as [Izlaz] from dbo.popis_repromaterijal_roba
  where (select redni_broj from dbo.popis_repromaterijal_lista _
  where redni_broj IS NOT NULL AND id = id_fakture) IS NOT NULL
  group by sifra,  naziv, jedinica_mjere
),

cteCombined2 AS (
    select ROW_NUMBER() OVER (ORDER BY roba) row_num,
 '' as [Naziv], '' as [J.M.], '0' as [Kolicina], _
    roba as [Izlaz] from dbo.mp_racun_roba
    where id_fakture IN (select id from mp_racun_lista _
    where datum = '2023-10-01' )
AND roba=(select naziv from dbo.roba_usluge _
    where podgrupa_artikala='HRANA' and roba_usluge.naziv=mp_racun_roba.roba)
group by sifra, roba
),
cte AS (
    SELECT
        row_num,
        [Naziv],
        [J.M.],
        SUM([Kolicina]) AS [Kolicina],
        [Izlaz]
    FROM cteCombined
	where [Kolicina] > 0
    GROUP BY
        row_num,
        [Naziv],
        [J.M.],
        [Izlaz]
),
cte2 AS (
    SELECT
        row_num,
        [Naziv],
        [J.M.],
        [Kolicina],
        [Izlaz]
    FROM cteCombined2
    GROUP BY
        row_num,
        [Naziv],
        [J.M.],
        [Izlaz],
        [Kolicina]
)
SELECT
    row_num,
    [Naziv],
    [J.M.],
   [Kolicina],
    [Izlaz]
FROM cte
GROUP BY
    row_num,
    [Naziv],
    [J.M.],
    [Kolicina],
    [Izlaz]
UNION ALL
SELECT
    row_num,
    [Naziv],
    [J.M.],
    [Kolicina],
    [Izlaz]
FROM cte2
GROUP BY
    row_num,
    [Naziv],
    [J.M.],
    [Kolicina],
    [Izlaz]
ORDER BY row_num