升级3.0出现了 "table_common_session->_table" is not defined

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The property "table_common_session->_table" is not defined PHP Debug [table=1]
No.	File	Line	Code
1	install/update.php	25	discuz_application->init()
2	source/class/discuz/discuz_application.php	68	discuz_application->_init_session()
3	source/class/discuz/discuz_application.php	377	discuz_session->__construct()
4	source/class/discuz/discuz_session.php	31	core::t(%s)
5	source/class/class_core.php	61	table_common_session->__construct()
6	source/class/table/table_common_session.php	18	discuz_base->__set(%s, %s)
7	source/class/discuz/discuz_base.php	30	break()

紧急求救啊

目前版本是2.0

原来升级2.5出现了这问题，就没有升级

没有想到升级3.0又出现这个问题啊

修复表也不好使啊

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