Tradfri Binding not working after upgrade to 2.5 release from 2.4

I already used the new 2.5 IKEA Tradfri binding with my 2.4 openhabian release which worked fine. Now I upgraded my openhabian from 2.4 release to the brand new 2.5 rlease and Tradfri and ZWave stopped working. I discussed the upgrade already in [SOLVED] Bundle-Handling with openhabian but this time the feature install via
feature:install openhab-transport-serial
only worked for the ZWave binding
feature:install openhab-transport-coap
for Tradfri didn’t make it work.

The binding is “installed” and when I try to start it with bundle:start I get the folowing error message:
Error starting bundle 137: Could not resolve module: org.openhab.binding.tradfri [137] Unresolved requirement: Import-Package: org.eclipse.californium.core; version="[1.0.0,2.0.0)"

Did you remove the manually installed binding before upgrading?
Unless you installed the binding on 2.4 after 2.5 was released you were likely running an older snapshot or milestone binding. Stable 2.5 expects a later binding.