Delete row 42 from invoices

id 42
trainer_id 2
student_id 4
invoice_no 2026-0016
category video_analysis
lines [{"service":"Schwunganalyse zur Stunde ...
total_cents 1990
status open
issued_at 2026-09-16 13:12:47
paid_at NULL
archived_at NULL
reminder1_at NULL
reminder2_at NULL
paid_method NULL
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