Statistics not working for any course but front page... returns following error:

Did you remember to make the first column something unique in your call to get_records? Duplicate value
'1292648400' found in column 'timeend'.
line 768 of /lib/dml/mysqli_native_moodle_database.php: call to debugging()
line 1256 of /lib/dml/moodle_database.php: call to mysqli_native_moodle_database->get_records_sql()
line 1331 of /lib/dml/moodle_database.php: call to moodle_database->get_record_sql()
line 857 of /lib/statslib.php: call to moodle_database->get_field_sql()
line 1446 of /lib/statslib.php: call to stats_get_start_from()
line 44 of /course/report/stats/index.php: call to stats_check_uptodate()

Fatal error: Call to undefined method moodle_page::headingmenu() in
/home/accountname/public_html/course/report/stats/index.php on line 58