JAVA Filed set方法报错

错误内容：ERROR Acceptor0.Processor0.Worker785 TradeManager:packFields - Can not set [Lafas_new.select_sub; field afas_new.select.consub to [Lafas_new.select_sub;
java.lang.IllegalArgumentException: Can not set [Lafas_new.select_sub; field afas_new.select.consub to [Lafas_new.select_sub;
看API文档不是声明底层字段的类或接口的实例报错，但是实在不明其意，哪位高手能通俗易懂的讲解一下么，谢谢！！！