From the log files it looks like your VM has tree virtual disks and two of them - located on different datastores - have the same file name. This may be the cause of the issue!?
Please run the following commands and post the output:
ls -lisa /vmfs/volumes/46f29969-8ed8ff29-3c8d-001b78980722/PTS-Datenbank1
ls -lisa /vmfs/volumes/46f2976c-b6abf6d1-d0fc-001b789803ee/PTS-Datenbank1_1
Are there any files on the ESXi 5 host to which you tried to migrate the VM?
André