Change the group's topic access_id

A closed group's member-only topics are opened to everyone on riverdashboard(other groups are in normal), I'd tried hard to find the solution, I have to dig into database.

Table elgg_river:

I found all the topics's access_id are "1", Other closed group's member-only topics are "3". I change them to "3", it works.

and then I even change this group's related things' access_id to "3". I change all what I can in the tables in database.

but once I creat a new topic in this group, the topic's access_id is still "1".

;-(