按照步骤安装，提示安装成功了，但是回到本地首页，刷新却出现下面的数据库error。请问如何解决？
错误信息：
Database error
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SQL: SELECT `aws_answer`.* FROM `aws_answer` WHERE (is_thief=0 AND uid <> 0) ORDER BY `add_time` DESC LIMIT 30
Error Message: Mysqli prepare error: Unknown column 'is_thief' in 'where clause'
