Delete row mock_seq_0052 from assignment_items

id mock_seq_0052
assignment_id asgn_cn_mock
child_id child_5b46b9f7
item_type single_choice
parent_id
sort_order 52
title 1. 在文中括号里选择恰当的读音，画"√"。
content
status pending
created_at 2026-06-14 08:07:16
updated_at 2026-06-14 08:07:16
major_index
ocr_major_title
major_score 0.0
subject chinese
section
options ["沉重（chén chéng）", "勉强（qiǎng qiáng） ...
correct_answer
image_idx 0
page_number 19
score 2.0
extra_content
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