Adding post indexes
One or more of the indexes being added is already defined If this query has already been run successfully, then this error can be safely ignored.  If in doubt, check the indexes in mysql and ensure that they are correct

	ALTER TABLE post
	  ADD INDEX threadid_visible_dateline (threadid, visible, dateline, userid, postid),
		ADD INDEX ipaddress (ipaddress),
    ADD INDEX dateline (dateline)

Duplicate key name 'threadid_visible_dateline'


Adding thread indexes
One or more of the indexes being added is already defined If this query has already been run successfully, then this error can be safely ignored.  If in doubt, check the indexes in mysql and ensure that they are correct

	ALTER TABLE thread
		DROP INDEX lastpost,
		ADD INDEX lastpost(lastpost),
	  ADD INDEX forumid_lastpost(forumid, lastpost)

Duplicate key name 'forumid_lastpost'