System failure: Invalid SQL: SELECT id FROM ows_cards WHERE publisher REGEXP '( ? |^)[[:blank:]]*? 568[[:blank:]]*( ? |$)' ORDER BY jahr, titel ASC

Information:

error message: Invalid SQL: SELECT id FROM ows_cards WHERE publisher REGEXP '( ? |^)[[:blank:]]*? 568[[:blank:]]*( ? |$)' ORDER BY jahr, titel ASC
mysql says: Got error 'repetition-operator operand invalid' from regexp


file: /var/www/vhosts/laupheimer-ansichtskarten.de/httpdocs/lib/system/database/MySQLDatabase.class.php (115)
php version: 5.4.45-0+deb7u7
ows version: 0.0.2
date: Thu, 30 Mar 2017 12:43:01 +0000
request: /publisher/%253F%2B568.html
referer:


Stacktrace:

#0 /var/www/vhosts/laupheimer-ansichtskarten.de/httpdocs/lib/data/publisher/Publisher.class.php(23): MySQLDatabase->sendQuery('SELECT id FROM ...')
#1 /var/www/vhosts/laupheimer-ansichtskarten.de/httpdocs/lib/page/PublisherPage.class.php(34): Publisher->__construct('? 568')
#2 /var/www/vhosts/laupheimer-ansichtskarten.de/httpdocs/lib/page/AbstractPage.class.php(67): PublisherPage->readData()
#3 /var/www/vhosts/laupheimer-ansichtskarten.de/httpdocs/lib/page/PublisherPage.class.php(57): AbstractPage->show()
#4 /var/www/vhosts/laupheimer-ansichtskarten.de/httpdocs/lib/page/AbstractPage.class.php(35): PublisherPage->show()
#5 /var/www/vhosts/laupheimer-ansichtskarten.de/httpdocs/lib/util/RequestHandler.class.php(60): AbstractPage->__construct()
#6 /var/www/vhosts/laupheimer-ansichtskarten.de/httpdocs/lib/util/RequestHandler.class.php(79): RequestHandler->__construct('Publisher', 'lib/', 'page')
#7 /var/www/vhosts/laupheimer-ansichtskarten.de/httpdocs/index.php(12): RequestHandler::handle('lib/')
#8 {main}
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