Network after migration of a BDC

Hello! I just migrated a VM - UCS backup DC from one vSphere server to another running Proxmox. The Server booted but since the network card changed, I could not reach it. I managed to login as root on the proxmox console and went to change the name of the network adapter from ens32 to ens18 in /etc/network/interfaces. After that it is reachable from the network and I can login with the Administrator account.
However there are some errors regarding samba drs replication

Traceback (most recent call last):
  File "/usr/lib/pymodules/python2.7/univention/management/console/modules/diagnostic/__init__.py", line 275, in execute
    result = execute(umc_module, **kwargs)
  File "/usr/lib/pymodules/python2.7/univention/management/console/modules/diagnostic/plugins/41_samba_tool_showrepl.py", line 149, in run
    drs = DRSUAPI()
  File "/usr/lib/pymodules/python2.7/univention/management/console/modules/diagnostic/plugins/41_samba_tool_showrepl.py", line 62, in __init__
    drs_tuple = drs_utils.drsuapi_connect(self.server, self.load_param, self.credentials)
  File "/usr/lib/python2.7/dist-packages/samba/drs_utils.py", line 56, in drsuapi_connect
    raise drsException("DRS connection to %s failed: %s" % (server, e))
drsException: drsException: DRS connection to bdc.intern.kunde.de failed: (-1073741258, 'The transport-connection attempt was refused by the remote system.')

Then I found out that there are ucr variables interfaces/ens32/ …
What do I need to adapt to make the sync work again?

Thanks in advance!