Delete row 5 from invoices

id 5
trainer_id 1
student_id 2
invoice_no 2026-0004
category video_analysis
lines [{"service":"Schwunganalyse zur Stunde ...
total_cents 499
status open
issued_at 2026-07-24 20:55:07
paid_at NULL
archived_at NULL
reminder1_at NULL
reminder2_at NULL
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