Cannot add or update a child row: a foreign key constraint fails (zqbp.zqbp_custom, CONSTRAINT zqbp_custom_ibfk_1 FOREIGN KEY (custom_trade) REFERENCES zqbp_industry (industry_id))
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zqbp_custom_ibfk_1这是什么？我明白这是外键约束的异常，但是不明白为什么给zqbp_custom加上_ibfk_1？
