Delete row 40 from invoices

id 40
trainer_id 2
student_id 15
invoice_no 2026-0014
category lesson
lines [{"service":"Einzelstunde am 15.09.202 ...
total_cents 7000
status open
issued_at 2026-09-15 09:56:52
paid_at NULL
archived_at NULL
reminder1_at NULL
reminder2_at NULL
paid_method NULL
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