@Aleksey Morozov (lexxxx89): It's not possible to avoid this issue with a bundle.yaml currently. There is no easy way to ask juju to deploy an older build of MySQL as it's not available from the archive normally. The only thing you could do is let it deploy then manually downgrade the mysql-router package everywhere - but the charms may or may not recover correctly from the original failing deploy depending on the charm.
@Aleksey Morozov (lexxxx89): It's not possible to avoid this issue with a bundle.yaml currently. There is no easy way to ask juju to deploy an older build of MySQL as it's not available from the archive normally. The only thing you could do is let it deploy then manually downgrade the mysql-router package everywhere - but the charms may or may not recover correctly from the original failing deploy depending on the charm.