Conflicting packages on update via dnf

I try to update my system via dnf. But unfortunately, it just ends with an error:

Running transaction check
Transaction check succeeded.
Running transaction test
The downloaded packages were saved in cache until the next successful transaction.
You can remove cached packages by executing ‘dnf clean packages’.
Error: Transaction check error:
file /usr/share/gcc-9/python/libstdcxx/pycache/init.cpython-37.opt-1.pyc from install of libstdc+±9.1.1-1.fc30.i686 conflicts with file from package libstdc+±9.0.1-0.10.fc30.x86_64
file /usr/share/gcc-9/python/libstdcxx/pycache/init.cpython-37.pyc from install of libstdc+±9.1.1-1.fc30.i686 conflicts with file from package libstdc+±9.0.1-0.10.fc30.x86_64
file /usr/share/doc/libxcrypt/NEWS from install of libxcrypt-4.4.6-1.fc30.i686 conflicts with file from package libxcrypt-4.4.4-2.fc30.x86_64

I tried reinstalling it, uninstalling it, but with no success. How can I get rid of the i684-package?