Delete row 16 from invoices

id 16
trainer_id 11
student_id 10
invoice_no 2026-0004
category offer
lines [{"service":"Reise","when" ...
total_cents 100000
status paid
issued_at 2026-08-18 06:44:06
paid_at 2026-08-18 06:44:24
archived_at NULL
reminder1_at NULL
reminder2_at NULL
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