I have read that it is not possible to use a 12c database as repository for the EM.
It is possible to use (for instance 188.8.131.52) with pacthes.
Yet, it could be possible to perform the cofiguration on 184.108.40.206 after having applied patches for bugs 10014178 and 8799099.
Does someone know why it is a necessity?
Thanks and Regards.
I guess this bug is related to some sql consuming high CPU and slowness and if Oracle recommends it, you should apply the fix of this bug. I do not think you will have any problem while installation, you might have problems later on while uploading or fetching data to and from repository.