Possible inconsistence data in db-sync

Question

I've this query on Preprod:

SELECT
    ENCODE(TX.HASH, 'hex') as tx_hash,
    TX_OUT.INDEX,
    TX_OUT.ADDRESS_HAS_SCRIPT,
    ENCODE(TX_OUT.DATA_HASH,'hex') AS DATUM_HASH,
    SCRIPT.ID as script_id,
    TX_OUT.REFERENCE_SCRIPT_ID,
ENCODE(INLINE_DATUM.HASH,'hex') AS INLINE_DATUM_HASH
FROM TX_OUT
INNER JOIN TX ON TX.ID = TX_OUT.TX_ID
LEFT JOIN "script" ON "script"."hash" = "tx_out"."payment_cred"
LEFT JOIN "datum" AS "inline_datum" ON "inline_datum"."id" = 
"tx_out"."inline_datum_id"
WHERE TX.HASH = 
DECODE('8502fe3617b70d12fc65c8c17dab8483f5a7f847e0fba0376fe7abacf4773262','hex')
AND TX_OUT.INDEX = 3;

Where I'm getting some info about a specific UTxO. The result is this:

 tx_hash                                                          | index | address_has_script |                            datum_hash                            | script_id | reference_script_id |                        inline_datum_hash                         
------------------------------------------------------------------+-------+--------------------+------------------------------------------------------------------+-----------+---------------------+------------------------------------------------------------------
 8502fe3617b70d12fc65c8c17dab8483f5a7f847e0fba0376fe7abacf4773262 |     3 | f                  | 93892d0c469bd1228f0e94621d3101e755523e97ea0a837c9b509b1aeb9d8c42 |           |                     | 93892d0c469bd1228f0e94621d3101e755523e97ea0a837c9b509b1aeb9d8c42

You can see the UTxO doesn't have script address_has_script = f and left join to script table is null (LEFT JOIN "script" ON "script"."hash" = "tx_out"."payment_cred") resulting on empty column script_id. The same goes to column reference_script_id .

So we can we can assume no script is involved in this UTxO but we can see it has data_hash and according to db-sync schema doc:

You can also notice the UTxO has inline datum (column inline_datum_hash in the query) which value is the same as data_hash. I know strictly speaking having data_hash doesn't mean it must have a script but I just cannot understand this UTxO.

Why data_hash is the same as inline_datum_hash, and what does it means?