Delete row 57 from invoices

id 57
trainer_id 11
student_id 29
invoice_no 2026-0022
category lesson
lines [{"service":"Einzelstunde 100 am 15.10 ...
total_cents 12000
status draft
issued_at 2026-10-15
paid_at NULL
archived_at NULL
reminder1_at NULL
reminder2_at NULL
paid_method NULL
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