When uploads are canceled, orphaned thumbnails may remain in the file system. Use the following task to manually remove them from the system:
./vimp framework:thumbnail-housekeeping
Important note:
In VIMP versions lower than 6.x, please use the command ./symfony instead of ./vimp in the code above.
The task is executed automatically with every VIMP update. If required, you can also call it regularly via a cronjob.