Delete row 6 from textbook_units

id 6
version_id yuwen_bubian_1s
unit_order 6
title 课文单元：秋天·小小的船·江南·四季·影子·比尾巴·青蛙写诗·雨点儿
unit_type regular
created_at 2026-06-18 03:47:59
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