Delete row 17 from invoices

id 17
trainer_id 10
student_id 16
invoice_no 2026-0002
category lesson
lines [{"service":"Einzelstunde 50 Min", ...
total_cents 19500
status open
issued_at 2026-06-26 14:06:00
paid_at NULL
archived_at 2026-06-26 14:31:11
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