插入数据时出现如下提示，请高手帮看看，非常感谢！已解决悬赏30积分

ERROR: SQLSTATE[23000]: Integrity constraint violation: 1062 Duplicate entry '19-1' for key 1

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The sql is: INSERT INTO nc_storySpec SET `story` = '19',`version` = '1',`title` = '百合网第一次见?\?5',`spec` = '业务描述',`verify` = '验收标准',`company` = '1'

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in /data/home/zp11f1/htdocs/lib/dao/dao.class.php on line 554, last called by /data/home/zp11f1/htdocs/module/story/model.php on 129 through function exec.