fdbrestore fails with: Missing backup data

Trying to restore backup which was made on 6.0.18
My version is 6.1.8

The error is:

```
Tag: default UID: a713aaec9e048425744647084b843be5 State: starting Blocks: 0/0 BlocksInProgress: 0 Files: 0 BytesWritten
: 0 ApplyVersionLag: 0 LastError: ''Missing backup data' on 'restore_start'' 12s ago.
```

I am performing:
```
fdbrestore start -r file:///home/$USER/fdb.backup/backup-2019-07-06-22-08-23.328692 --dest_cluster_file ./fdb.cluster -w
```
what am I doing wrong, or should I have the same version of FoundationDB with which the backup was performed?

After updating source db I still have same error, even when both versions are 6.1.8.
The only difference is the replication factor, how am I supposed to move data from one db to another if replication factors a different?

When I trying to import data via disaster recovery I got:

```
fdbdr status
SIGNAL: Segmentation fault (11)
Trace: addr2line -e fdbdr.debug -p -C -f -i 0x9d2de5 0x7faf1b8d60e0 0x5a81cf 0x5ac04d 0x478fd0 0x535b7b 0x82df48 0x6209c0 0x75fe33 0x76017b 0x74b248 0x74b54d 0x7e52f0 0x752129 0x7e52f0 0x791ec7 0x792010 0x76bfd0 0x777445 0x77bdd8 0x77bfdd 0x797dc0 0x71f018 0x927495 0x927819 0x478f40 0xa19e8a 0x74046e 0x423c15 0x7faf1b03a2e1
```

command:
```
fdbdr start -d ./fdb.cluster -s /etc/foundationdb/fdb.cluster
```