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

• line 1599 of /lib/dml/moodle_database.php: call to debugging()
• line 1660 of /lib/dml/moodle_database.php: call to moodle_database->get_record_sql()
• line 1641 of /lib/dml/moodle_database.php: call to moodle_database->get_field_sql()
• line 682 of /mod/chat/lib.php: call to moodle_database->get_field_select()
• line 36 of /mod/chat/view.php: call to chat_update_chat_times()

This page did not call $PAGE->set_url(...). Using http://tele-ens.univ-oeb.dz/moodle/mod/chat/view.php?id=96297

• line 610 of /lib/pagelib.php: call to debugging()
• line 830 of /lib/pagelib.php: call to moodle_page->magic_get_url()
• line 1795 of /lib/questionlib.php: call to moodle_page->__get()
• line 4551 of /lib/navigationlib.php: call to question_extend_settings_navigation()
• line 4158 of /lib/navigationlib.php: call to settings_navigation->load_course_settings()
• line 769 of /lib/pagelib.php: call to settings_navigation->initialise()
• line 830 of /lib/pagelib.php: call to moodle_page->magic_get_settingsnav()
• line 136 of /blocks/settings/block_settings.php: call to moodle_page->__get()
• line 336 of /blocks/moodleblock.class.php: call to block_settings->get_content()
• line 230 of /blocks/moodleblock.class.php: call to block_base->formatted_contents()
• line 1181 of /lib/blocklib.php: call to block_base->get_content_for_output()
• line 1233 of /lib/blocklib.php: call to block_manager->create_block_contents()
• line 643 of /lib/outputrenderers.php: call to block_manager->ensure_content_created()
• line 83 of /theme/adaptable/layout/includes/head.php: call to core_renderer->standard_head_html()
• line 130 of /theme/adaptable/layout/includes/header.php: call to require_once()
• line 30 of /theme/adaptable/layout/columns2.php: call to require_once()
• line 1374 of /lib/outputrenderers.php: call to include()
• line 1304 of /lib/outputrenderers.php: call to core_renderer->render_page_layout()
• line 1941 of /lib/setuplib.php: call to core_renderer->header()
• line 64 of /mod/chat/view.php: call to bootstrap_renderer->__call()