Omeka has encountered an error

Zend_Db_Statement_Mysqli_Exception

Mysqli prepare error: Expression #1 of ORDER BY clause is not in GROUP BY clause and contains nonaggregated column 'dana_rsrch.et_sort.text' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by

exception 'Zend_Db_Statement_Mysqli_Exception' with message 'Mysqli prepare error: Expression #1 of ORDER BY clause is not in GROUP BY clause and contains nonaggregated column 'dana_rsrch.et_sort.text' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by' in /afs/cad.njit.edu/research/archlib/gervits/1/application/libraries/Zend/Db/Statement/Mysqli.php:77
Stack trace:
#0 /afs/cad.njit.edu/research/archlib/gervits/1/application/libraries/Zend/Db/Statement.php(115): Zend_Db_Statement_Mysqli->_prepare('SELECT `items`....')
#1 /afs/cad.njit.edu/research/archlib/gervits/1/application/libraries/Zend/Db/Adapter/Mysqli.php(388): Zend_Db_Statement->__construct(Object(Zend_Db_Adapter_Mysqli), 'SELECT `items`....')
#2 /afs/cad.njit.edu/research/archlib/gervits/1/application/libraries/Zend/Db/Adapter/Abstract.php(479): Zend_Db_Adapter_Mysqli->prepare('SELECT `items`....')
#3 [internal function]: Zend_Db_Adapter_Abstract->query(Object(Omeka_Db_Select), Array)
#4 /afs/cad.njit.edu/research/archlib/gervits/1/application/libraries/Omeka/Db.php(79): call_user_func_array(Array, Array)
#5 /afs/cad.njit.edu/research/archlib/gervits/1/application/libraries/Omeka/Db/Table.php(648): Omeka_Db->__call('query', Array)
#6 /afs/cad.njit.edu/research/archlib/gervits/1/application/libraries/Omeka/Db/Table.php(648): Omeka_Db->query(Object(Omeka_Db_Select), Array)
#7 /afs/cad.njit.edu/research/archlib/gervits/1/application/libraries/Omeka/Db/Table.php(281): Omeka_Db_Table->fetchObjects(Object(Omeka_Db_Select))
#8 [internal function]: Omeka_Db_Table->findBy(Array, 25, 1)
#9 /afs/cad.njit.edu/research/archlib/gervits/1/application/controllers/helpers/Db.php(59): call_user_func_array(Array, Array)
#10 /afs/cad.njit.edu/research/archlib/gervits/1/application/libraries/Omeka/Controller/AbstractActionController.php(128): Omeka_Controller_Action_Helper_Db->__call('findBy', Array)
#11 /afs/cad.njit.edu/research/archlib/gervits/1/application/libraries/Omeka/Controller/AbstractActionController.php(128): Omeka_Controller_Action_Helper_Db->findBy(Array, 25, 1)
#12 /afs/cad.njit.edu/research/archlib/gervits/1/application/controllers/ItemsController.php(183): Omeka_Controller_AbstractActionController->browseAction()
#13 /afs/cad.njit.edu/research/archlib/gervits/1/application/libraries/Zend/Controller/Action.php(516): ItemsController->browseAction()
#14 /afs/cad.njit.edu/research/archlib/gervits/1/application/libraries/Zend/Controller/Dispatcher/Standard.php(308): Zend_Controller_Action->dispatch('browseAction')
#15 /afs/cad.njit.edu/research/archlib/gervits/1/application/libraries/Zend/Controller/Front.php(954): Zend_Controller_Dispatcher_Standard->dispatch(Object(Zend_Controller_Request_Http), Object(Zend_Controller_Response_Http))
#16 /afs/cad.njit.edu/research/archlib/gervits/1/application/libraries/Zend/Application/Bootstrap/Bootstrap.php(105): Zend_Controller_Front->dispatch()
#17 /afs/cad.njit.edu/research/archlib/gervits/1/application/libraries/Zend/Application.php(382): Zend_Application_Bootstrap_Bootstrap->run()
#18 /afs/cad.njit.edu/research/archlib/gervits/1/application/libraries/Omeka/Application.php(79): Zend_Application->run()
#19 /afs/cad.njit.edu/research/archlib/gervits/1/index.php(23): Omeka_Application->run()
#20 {main}