conflicts in scylla-tools when downgrade 2.0->1.7.x

[abvgedeika]

steps:

1. upgrade 1.7.2-> 2.0 latest

echo "[scylla]
name=Scylla for Centos $releasever - $basearch
baseurl=http://downloads.scylladb.com/rpm/unstable/centos/branch-2.0/latest/scylla/\$releasever/\$basearch/
enabled=1
gpgcheck=0

[scylla-generic]
name=Scylla for centos $releasever
baseurl=http://downloads.scylladb.com/rpm/unstable/centos/branch-2.0/latest/scylla/\$releasever/noarch/
enabled=1
gpgcheck=0

[scylla-3rdparty]
name=Scylla 3rdParty for Centos $releasever - $basearch
baseurl=http://downloads.scylladb.com/rpm/unstable/centos/branch-2.0/latest/3rdparty/\$releasever/\$basearch/
enabled=1
gpgcheck=0

[scylla-3rdparty-generic]
name=Scylla 3rdParty for Centos $releasever
baseurl=http://downloads.scylladb.com/rpm/unstable/centos/branch-2.0/latest/3rdparty/\$releasever\/noarch/
enabled=1
gpgcheck=0" > /tmp/scylla.repo

sudo cp /etc/yum.repos.d/scylla.repo ~/scylla.repo-backup
sudo cp /tmp/scylla.repo /etc/yum.repos.d/scylla.repo
            # backup the data
sudo cp /etc/scylla/scylla.yaml /etc/scylla/scylla.yaml-backup
sudo nodetool snapshot
sudo chown root.root /etc/yum.repos.d/scylla.repo
sudo chmod 644 /etc/yum.repos.d/scylla.repo
sudo yum clean all
sudo yum install scylla scylla-server scylla-jmx scylla-tools scylla-conf scylla-kernel-conf scylla-debuginfo -y
        # flush all memtables to SSTables
sudo nodetool drain
sudo systemctl restart scylla-server.service
#        node.wait_db_up(verbose=True)
rpm -qa scylla-server

2. then try to downgrade till latest 1.7:

rpm -qa scylla-server
sudo cp ~/scylla.repo-backup /etc/yum.repos.d/scylla.repo
# backup the data
nodetool snapshot
sudo chown root.root /etc/yum.repos.d/scylla.repo
sudo chmod 644 /etc/yum.repos.d/scylla.repo
sudo yum clean all
sudo yum downgrade scylla scylla-server scylla-jmx scylla-tools scylla-conf scylla-kernel-conf -y

result:

Transaction check error:
  file /usr/share/scylla/cassandra/apache-cassandra-3.0.8-SNAPSHOT.jar from install of scylla-tools-1.7.3-20170719.ca9c263.el7.centos.noarch conflicts with file from package scylla-tools-core-2.0.rc1-20170723.8e1ef86.el7.centos.noarch
  file /usr/share/scylla/cassandra/apache-cassandra-thrift-3.0.8-SNAPSHOT.jar from install of scylla-tools-1.7.3-20170719.ca9c263.el7.centos.noarch conflicts with file from package scylla-tools-core-2.0.rc1-20170723.8e1ef86.el7.centos.noarch
  file /usr/share/scylla/cassandra/cassandra.in.sh from install of scylla-tools-1.7.3-20170719.ca9c263.el7.centos.noarch conflicts with file from package scylla-tools-core-2.0.rc1-20170723.8e1ef86.el7.centos.noarch
  file /usr/share/scylla/cassandra/scylla-tools-3.0.8-SNAPSHOT.jar from install of scylla-tools-1.7.3-20170719.ca9c263.el7.centos.noarch conflicts with file from package scylla-tools-core-2.0.rc1-20170723.8e1ef86.el7.centos.noarch
  file /usr/share/scylla/cassandra/stress.jar from install of scylla-tools-1.7.3-20170719.ca9c263.el7.centos.noarch conflicts with file from package scylla-tools-core-2.0.rc1-20170723.8e1ef86.el7.centos.noarch

Error Summary

all commands and output https://gist.github.com/abvgedeika/18e63c9e556cb8bb7f1d39ed9ec6c375