Hi tomsommer,
The MySQL Community 5.7 packages need to be removed prior to installation of the Percona Server 5.7 packages. This is required since the packages cannot both be installed simultaneously. This is mentioned here:
https://www.percona.com/doc/percona-…-distributions
“Note that this procedure is the same for upgrading from MySQL 5.6 or 5.7 to Percona Server 5.7 …”
However, I believe this could be more prominent. I am discussing this with our documentation team to make this more clear.
–Dave