Debugging: Error: mdb->get_record() found more than one record! in

* line 1488 of /lib/dml/moodle_database.php: call to debugging()

* line 1448 of /lib/dml/moodle_database.php: call to moodle_database->get_record_sql()

* line 1427 of /lib/dml/moodle_database.php: call to moodle_database->get_record_select()

* line 722 of /local/hub/lib.php: call to moodle_database->get_record()

* line 1105 of /local/hub/lib.php: call to local_hub->get_site_by_url()

* line 181 of /local/hub/externallib.php: call to local_hub->register_site()

* line 30 of /webservice/lib.php(1275) : eval()'d code: call to local_hub_external::update_site_info()

* line ? of unknownfile: call to webservices_virtual_class_000000->hub_update_site_info()

* line 232 of /lib/zend/Zend/Server/Abstract.php: call to call_user_func_array()

* line 599 of /lib/zend/Zend/XmlRpc/Server.php: call to Zend_Server_Abstract->_dispatch()

* line 337 of /lib/zend/Zend/XmlRpc/Server.php: call to Zend_XmlRpc_Server->_handle()

* line 1179 of /webservice/lib.php: call to Zend_XmlRpc_Server->handle()

* line 38 of /local/hub/webservice/webservices.php: call to webservice_zend_server->run()