Hello,
I think it is possible. You can use the WordPress function delete_post_meta() to delete a field value.
Or get the field value, put it into a loop and delete the last element of the cloneable and re-update the field value with update_post_meta().
It would need some custom code to do and beyond our scope of support. If you are not able to complete the task, please contact us here https://metabox.io/contact/, our development team will help you with some extra fee.