Constante déjà posée
B avant coupure   date 2026-09-12 ref 'WC-REFUND-99999901'       => refusé  OK
     [Splash Client] Credit note dated 2026-09-12 is before 2026-09-13: refused, earlier refunds are booked by hand.
C sans référence  date 2026-09-13 ref NULL                       => refusé  OK
     [Splash Client] Credit note without external reference: refused, a duplicate could not be detected.
D doublon         date 2026-09-14 ref 'WC-REFUND-61963'          => refusé  OK
     [Splash Client] External reference WC-REFUND-61963 is already used by AV2608-0109: credit note refused.
Factures en base : 1395 avant, 1395 après
>>> TOUS LES REFUS CONFORMES, rien écrit