Delete row 991 from pager_paper_questions

id 991
question_id q_700b616c
assignment_id asgn_eedd7f34
type fill_blank
content_text 看拼音，写词语。（4分） chè dǐ jūn fá jiǎo xíng xī shēng
score 4.0
difficulty 0.5
correct_answer
explanation
sort_order 0
assigned_page 1
page_order 1
image_idx 0
section jichu
options []
major_index
extra_content []
ref_material_id NULL
ref_paragraph_index NULL
create_time 2026-06-16 13:59:33
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