Migration failes

Hi,

i get following Error when i uses Plesk 12.5.30 #23 Migration Tool:

Detailed Migration Status
|
|- Administrator
|
`- Client 'mcdonald@your-domain.de (Daniel McDonald, mcdonald@your-domain.de)'
|
`- Subscription 'your-domain.de'
|
|- warning: Protected directory 'plesk-stat' of domain 'your-domain.de':
| login of protected directory user 'your-domain.de' does not conform to Plesk validation rules.
| Login was...

Migration failes