fix errors:
Global symbol "$sth" requires explicit package name at ./scripts/import-csv.pl line 161.
Global symbol "$sth" requires explicit package name at ./scripts/import-csv.pl line 162.
Execution of ./scripts/import-csv.pl aborted due to compilation errors.
fix errors: Global symbol "$sth" requires explicit package name at ./scripts/import-csv.pl line 161. Global symbol "$sth" requires explicit package name at ./scripts/import-csv.pl line 162. Execution of ./scripts/import-csv.pl aborted due to compilation errors.