[PVE-User] Need install ceph hammer on pve 3.4

[Жюль Верн]

Hi, i know that pve 3.4 and ceph hammer is EOL. But for some tests i need
to install it. I have pve 3.4 3 nodes in cluster. Now i need to install
ceph hammer on it. But there is no working repo for ceph hammer install.
Try manually download and install .deb packages from ceph repo. But for
example when install ceph_0.94.9-1~bpo70+1_amd64.deb get error:

dpkg: regarding ceph_0.94.9-1~bpo70+1_amd64.deb containing ceph:
 ceph breaks python-ceph (<< 0.92-1223)
  python-ceph (version 0.80.8-1~bpo70+1) is present and installed.

dpkg: error processing ceph_0.94.9-1~bpo70+1_amd64.deb (--install):
 installing ceph would break python-ceph, and
 deconfiguration is not permitted (--auto-deconfigure might help)
Errors were encountered while processing:
 ceph_0.94.9-1~bpo70+1_amd64.deb

Plz help me complete this quest ! ))