Issue: Protected Pages DB error

Database error in vBulletin 3.8.4:

Invalid SQL:

		SELECT thread.title, thread.threadid, thread.prefixid, thread.forumid, post.pagetext, prot.options
		FROM vault_protect AS prot
		LEFT JOIN thread AS thread ON (prot.targetid = thread.threadid)
		LEFT JOIN post AS post ON (post.postid = thread.firstpostid)
		WHERE forumid IN (79)
			AND protect.namespaceid = 6
			AND protect.options NOT IN (0,4)
		ORDER BY thread.title ASC
		LIMIT 0,50;

MySQL Error   : Unknown column 'protect.namespaceid' in 'where clause'
Error Number  : 1054