BigIP not available after upgrade from 13.1.4 to 13.1.6

thank you Deepak!

the problem is fixed. But I have one question to you! : is it true that there is known bug on 13.1.x (that F5 is actually working with, now) regarding the muti-partition BigIP (several config file on several local partitions locally) : when you upgrade from a version to another you should not need to export the file as well, although the versions are on different partitions (which I did). But actually you have to select your config as well.