How to do a downgrade in debian after doing "apt-get dist-upgrade -t jessie-backports"

Originally my system was on 8.0 and now it's 8.6 but this latest version does not support all playonlinux requirements to run 86x_64x applications, then I'd like to know if it's possible to safely do a downgrade to my old version 8.0. Ps: I did nothing with the repositories except adding jessie-backports to sources.list and performing: >sudo apt-get -t jessie-backports dist-upgrade After that my kernel was also upgraded as well my /etc/os-release status to Debian Jessie 8.6. Ps2: Would be great to keep my current Os and Kernel versions and also have my playonlinux 32 bits software working, but, if not, going back to my old system version is ok too. Sorry if this topic was already answered in another question, but I've been searching for that and haven't found it.