Thread:Extension talk:UserMerge/Database error A database query error has occurred. This may indicate a bug in the software./reply (4)

this is a good advice.

im nevertheless not sure how to solve this problem:

A database query error has occurred. This may indicate a bug in the software.

Query: UPDATE `ipblocks` SET ipb_user = '149',ipb_address = 'ZinaidaBryson' WHERE ipb_user = '350' Function: UserMerge::mergeUser Error: 1062 Duplicate entry 'ZinaidaBryson-149-0-0' for key 'ipb_address' (localhost)

Backtrace:


 * 1) 0 /var/www/web/html/wiki/includes/db/Database.php(1123): DatabaseBase->reportQueryError('Duplicate entry...', 1062, 'UPDATE `ipbloc...', 'UserMerge::merg...', false)
 * 2) 1 /var/www/web/html/wiki/includes/db/Database.php(1986): DatabaseBase->query('UPDATE `ipbloc...', 'UserMerge::merg...')
 * 3) 2 /var/www/web/html/wiki/extensions/UserMerge/UserMerge_body.php(434): DatabaseBase->update('ipblocks', Array, Array, 'UserMerge::merg...')
 * 4) 3 /var/www/web/html/wiki/extensions/UserMerge/UserMerge_body.php(260): UserMerge->mergeUser(Object(User), 'ZinaidaBryson', '149', Object(User), 'Abbotthcfo', '350')
 * 5) 4 /var/www/web/html/wiki/includes/specialpage/SpecialPage.php(379): UserMerge->execute(NULL)
 * 6) 5 /var/www/web/html/wiki/includes/specialpage/SpecialPageFactory.php(503): SpecialPage->run(NULL)
 * 7) 6 /var/www/web/html/wiki/includes/Wiki.php(285): SpecialPageFactory::executePath(Object(Title), Object(RequestContext))
 * 8) 7 /var/www/web/html/wiki/includes/Wiki.php(588): MediaWiki->performRequest
 * 9) 8 /var/www/web/html/wiki/includes/Wiki.php(447): MediaWiki->main
 * 10) 9 /var/www/web/html/wiki/index.php(46): MediaWiki->run
 * 11) 10 {main}