Error in a package?

[Grzegorz Junka]

Why I can not upgrade this package, even forcefully?

root at ultrabook:~ # pkg upgrade -f javavmwrapper
Updating ultrabook repository catalogue...
ultrabook repository is up-to-date.
All repositories are up-to-date.
The following 1 package(s) will be affected (of 0 checked):

Installed packages to be UPGRADED:
         javavmwrapper: 2.5_1 -> 2.5_2

Number of packages to be upgraded: 1

16 KiB to be downloaded.

Proceed with this action? [y/N]: y
Fetching javavmwrapper-2.5_2.txz: 100%   16 KiB  16.4kB/s 00:01
Checking integrity... done (0 conflicting)
[1/1] Upgrading javavmwrapper from 2.5_1 to 2.5_2...
[1/1] Extracting javavmwrapper-2.5_2: 100%
You may need to manually remove /usr/local/etc/javavm_opts.conf if it is 
no longer needed.
pkg: Fail to rename /usr/local/bin/.checkvms.cSKXJhAdFAsw -> 
/usr/local/bin/checkvms: No such file or directory