Error upgrade 1.6.2 -- 1.7.0

[wantman]

Have you checked code permissions (try 777 or 755)?

Yes, i'm try 777 and 755 permissions, but have error:
# Failed to execute DB schema transformations. MySQL said: Duplicate entry 'slim' for key 2

Are you sure you replaced all files?

Yes, i'm replace all files, because i'm create archive.

Was the upgrade interrupted by a power failure or a process killed while upgrading?

No, i'm don't have power failure or a process killed while upgrading

So thanks for help, i'm try write ticket.

[cabeza]

FYI: If those tables exist, the migration process must have been ran before.