In mod/scorm/report/basic/report.php
SQL IN statements are used as mentioned below:-
$where = ' WHERE u.id IN (' .$allowedlist. ') AND st.userid IS NOT NULL';
$where = ' WHERE u.id IN (' .$allowedlist. ') AND st.userid IS NULL';
$where = ' WHERE u.id IN (' .$allowedlist. ') AND (st.userid IS NOT NULL OR st.userid IS NULL)';

as per new moodle standards no sql statements should use IN directly in this way
Reference: http://docs.moodle.org/dev/DB_layer_2.0_migration_docs#The_golden_changes (G7)