SCP not working anymore since upgrade to 12.1

Hi,

 

I recently upgraded my Big-IP from 11.6 HF6 to 12.1 successfully. However, I am not able anymore to execute scp commands which I used to transfer my ucs backups remotely. Any attempt always end up with a "no hostkey alg" error. I tried many different things like regenerating rsa and dsa keys like I always do after an upgrade, but as of today have been unsuccessful...

 

Any advice someone ?

 

Thanks, Pascal.