My b2evolution Version: 0.9.x

Hi there.

I was trying to upgrade my weblog from ver. 0.9.0.12 to 2.01, but i am getting this error:

Upgrading data in existing b2evolution database...

Checking DB schema version... 9408 : OK.
Updating blogs access types...
An unexpected error has occured!

If this error persits, please report it to the administrator.

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Additional information about this error:

MySQL error!

Unknown column 'blog_stub' in 'field list'(Errno=1054)

Your query:

UPDATE evo_blogs
SET blog_access_type = "relative",
blog_siteurl = CONCAT( blog_siteurl, blog_stub )

WHERE blog_access_type = "stub"

What can i do to resolve this?
Thanx in advance!