Auto Complete returns not existing mail

[lindworm]

In only one account is an not existing shown at auto complete when I search for "1jh". (It's the prename of the right result)
The wrong result is: 1jh@domain.de
The right result is also shown: joerg@domain.de

I enabled debug logging for this account.
zmprov aal walter@domain.de zimbra.soap debug

This is the result:

1;ip=xy;ua=ZimbraWebClient - FF3.0 (Linux)/6.0.5_GA_2213.RHEL5_64;] gal - autocomplete: overall=32ms, ranking=1ms, folder=31ms, gal=0ms
1;ip=xy;ua=ZimbraWebClient - FF3.0 (Linux)/6.0.5_GA_2213.RHEL5_64;] soap - SOAP response: 
{
  "Header": {
    "context": {
      "session": {
        "id": "1499826",
        "_content": "1499826"
      },
      "change": {
        "token": 32557
      },
      "_jsns": "urn:zimbra"
    }
  },
  "Body": {
    "AutoCompleteResponse": {
      "canBeCached": true,
      "match": [
        {
          "email": "\u003C1jh@domain.de\u003E",
          "type": "unknown",
          "ranking": "8"
        },
        {
          "email": "\"1jh \" \u003Cjoerg@domain.de\u003E",
          "type": "contact",
          "ranking": "0",
          "id": "25711",
          "l": "7"
        }],
      "_jsns": "urn:zimbraMail"
    }
  },
  "_jsns": "urn:zimbraSoap"
}

The right result has the type contact. The wrong result has the type unknown. So I think it don't looks like a contact from adressbook or gal, but from where else should it come?

Any ideas?

[Abzstrak]

maybe I'm misunderstanding, but it sounds like in that one accounts 'emailed contacts' list that they have an invalid entry... in which case, just delete it.

[cayaraa]

You might be running into this if your not on 6.0.6:
Old display names in autocomplete