Upgrade from 1.6.5.3/4 to 1.7.1 broken

Copying /etc/opt/membase/1.6.5.4/ns_1/config.dat.debsave

    cp /etc/opt/membase/1.6.5.4/ns_1/config.dat.debsave /opt/membase/var/lib/membase/config/config.dat

Copying /opt/membase/var/lib/membase/ip

    cp /opt/membase/var/lib/membase/ip /opt/membase/var/lib/membase/ip

Traceback (most recent call last):

  File "/opt/membase/bin/mbupgrade", line 435, in <module>

    main()

  File "/opt/membase/bin/mbupgrade", line 430, in main

    dbdir, buckets, dry_run=dry_run)

  File "/opt/membase/bin/mbupgrade", line 130, in upgrade

    dry_run=dry_run)

  File "/opt/membase/bin/mbupgrade", line 84, in copy_cfg

    shutil.copyfile(cfg, dst)

  File "/usr/local/lib/python2.7/shutil.py", line 68, in copyfile

    raise Error("`%s` and `%s` are the same file" % (src, dst))

shutil.Error: `/opt/membase/var/lib/membase/ip` and `/opt/membase/var/lib/membase/ip` are the same file

dpkg: error processing membase-server (--install):

 subprocess installed post-installation script returned error exit status 1

Processing triggers for ureadahead ...

Errors were encountered while processing:

 membase-server

2011-08-11 14:23:27 upgrade membase-server 1.6.5.4 1.7.1

2011-08-11 14:23:27 status half-configured membase-server 1.6.5.4

2011-08-11 14:23:30 status unpacked membase-server 1.6.5.4

2011-08-11 14:23:30 status half-installed membase-server 1.6.5.4

2011-08-11 14:23:59 status triggers-pending ureadahead 0.100.0-4.1

2011-08-11 14:23:59 status half-installed membase-server 1.6.5.4

2011-08-11 14:24:11 status half-installed membase-server 1.6.5.4

2011-08-11 14:24:12 status unpacked membase-server 1.7.1

2011-08-11 14:24:12 status unpacked membase-server 1.7.1

2011-08-11 14:24:12 configure membase-server 1.7.1 1.7.1

2011-08-11 14:24:12 status unpacked membase-server 1.7.1

2011-08-11 14:24:12 status half-configured membase-server 1.7.1

2011-08-11 14:24:14 trigproc ureadahead 0.100.0-4.1 0.100.0-4.1

2011-08-11 14:24:14 status half-configured ureadahead 0.100.0-4.1

2011-08-11 14:24:15 status installed ureadahead 0.100.0-4.1