Delete row 9 from invoices

id 9
trainer_id 5
student_id 6
invoice_no R-2026-0002
category card_purchase
lines [{"label":"Einzelstunden 10er Karte ...
total_cents 75000
status open
issued_at 2026-08-06 15:15:36
paid_at NULL
archived_at NULL
reminder1_at NULL
reminder2_at NULL
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