Incorrect content of hash pool file

I was trying to add a new scorm activity, using the same file with a different name (current.zip and current_new.zip, for example), from a repository I have, but moodle doesn't allow me deploy the package (see attached screenshot)

I checked the "files" table and both files have the same contenthash, what I suspect may be the problem.

This issue was also reported here http://moodle.org/mod/forum/discuss.php?d=164323 but with a different approach (backup)