Become superuser on the KDC that contains the stash file.
Remove the stash file.
| # rm stash-file | 
In this example, stash-file is the path to the stash file. By default, the stash file is located at /var/krb5/.k5.realm.
If you need to re-create the stash file, you can use the -f option of the kdb5_util command.