Error upgrading to fedora 29

Hello friends;

I've tried to upgrade from Fedora 28 to Fedora 29 using both methods:
Gnome software and DNF, but the process fail with the following
message:

error running transaction: file / from install of filesystem-3.9-
2.fc29.x86_64 conflicts with file from stacer-1.0.9-0.amd64

Please, can someone tell me what that it means and how to solve it?

Thanks a lot in advance.

Cheers!
--
Sergio