Error:
Omeka has encountered an error
Zend_Db_Statement_Mysqli_Exception
Mysqli prepare error: Unknown column 'salt' in 'where clause'
#0 /var/www/html/elibrary/application/libraries/Zend/Db/Statement.php(115): Zend_Db_Statement_Mysqli->_prepare('SELECT users
....')
#1 /var/www/html/elibrary/application/libraries/Zend/Db/Adapter/Mysqli.php(388): Zend_Db_Statement->__construct(Object(Zend_Db_Adapter_Mysqli), 'SELECT users
....')
#2 /var/www/html/elibrary/application/libraries/Zend/Db/Adapter/Abstract.php(479): Zend_Db_Adapter_Mysqli->prepare('SELECT users
....')
#3 /var/www/html/elibrary/application/libraries/Zend/Db/Adapter/Abstract.php(756): Zend_Db_Adapter_Abstract->query(Object(Omeka_Db_Select), Array)
#4 [internal function]: Zend_Db_Adapter_Abstract->fetchRow(Object(Omeka_Db_Select), Array)
#5 /var/www/html/elibrary/application/libraries/Omeka/Db.php(79): call_user_func_array(Array, Array)
#6 /var/www/html/elibrary/application/libraries/Omeka/Db/Table.php(612): Omeka_Db->__call('fetchRow', Array)
#7 /var/www/html/elibrary/application/libraries/Omeka/Db/Table.php(612): Omeka_Db->fetchRow(Object(Omeka_Db_Select), Array)
#8 /var/www/html/elibrary/application/libraries/Omeka/Db/Table.php(415): Omeka_Db_Table->fetchObject(Object(Omeka_Db_Select), Array)
#9 /var/www/html/elibrary/application/models/User.php(211): Omeka_Db_Table->findBySql('username = ? AN...', Array, true)
#10 /var/www/html/elibrary/application/controllers/UsersController.php(361): User::upgradeHashedPassword('elibrary', '*********')
#11 /var/www/html/elibrary/application/libraries/Zend/Controller/Action.php(516): UsersController->loginAction()
#12 /var/www/html/elibrary/application/libraries/Zend/Controller/Dispatcher/Standard.php(308): Zend_Controller_Action->dispatch('loginAction')
#13 /var/www/html/elibrary/application/libraries/Zend/Controller/Front.php(954): Zend_Controller_Dispatcher_Standard->dispatch(Object(Zend_Controller_Request_Http), Object(Zend_Controller_Response_Http))
#14 /var/www/html/elibrary/application/libraries/Zend/Application/Bootstrap/Bootstrap.php(97): Zend_Controller_Front->dispatch()
#15 /var/www/html/elibrary/application/libraries/Zend/Application.php(366): Zend_Application_Bootstrap_Bootstrap->run()
#16 /var/www/html/elibrary/application/libraries/Omeka/Application.php(79): Zend_Application->run()
#17 /var/www/html/elibrary/admin/index.php(28): Omeka_Application->run()
#18 {main}
How can I fix this? Thank you in advance