libvirt users - Jul 2013 - Xen + libvirt: VM name 'Domain-Unnamed' already exists

I had to restart a paravirt guest and could not start over again.

It's a xenstore crash?

    Compiled against library: libvirt 1.0.3
    Using library: libvirt 1.0.3
    Usando a API: Xen 1.0.3
    Hypervisor em execução: Xen 4.2.0

CentOS 6 - x64

    Linux eagle 3.9.8-1.el6xen.x86_64 #1 SMP Sat Jun 29 16:23:39 EST 2013 x86_64
x86_64 x86_64 GNU/Linux

I've got this error:
...
    [07.08.2013 08:21:45 3322] INFO (XendDomainInfo: 169) Recreating domain 13,
UUID 0a1ddba3-c1d7-5675-9e5d-1b79d02b5ea2. at / local/domain/13
    [07.08.2013 08:21:45 3322] WARNING (XendDomainInfo: 191) /
vm/0a1ddba3-c1d7-5675-9e5d-1b79d02b5ea2/uuid / is missing. recreate is confused,
trying our best to recover
    [07.08.2013 08:21:45 3322] ERROR (XendDomain: 447) Unable to recreate domain
    Traceback (most recent call last):
       File "/
usr/lib64/python2.6/site-packages/xen/xend/XendDomain.py", line 445, in
_refreshTxn
         new_dom XendDomainInfo.recreate = (dom, False)
       File "/
usr/lib64/python2.6/site-packages/xen/xend/XendDomainInfo.py", line 204, in
recreate
         vmpath = vmpath)
       File "/
usr/lib64/python2.6/site-packages/xen/xend/XendDomainInfo.py", line 455, in
__ init__
         self._checkName (self.info ['name_label'])
       File "/
usr/lib64/python2.6/site-packages/xen/xend/XendDomainInfo.py", line 3524,
in _checkName
         ("The domain% s"% str (dom.domid)) or ""))
    VmError: VM name 'Domain-Unnamed' already exists
...