I tried updating python-networking-bigswitch-2015.3.8-1.el7ost.noarch from 9 version to 10.
After installing the package on version 9, I removed the repo of version 9 and run 'rhos release 10' to create repo for 10 in order to run yum update command.
yum update failed when having the repo of 10, but if you remove the python-networking-bigswitch (that was installed during 9 installation) and install it again an action succeeds.
So in order to update the versin of python-networking-bigswitch you need to remove and install the package again instead of running yum update command
Attachment shows that update fails while remove and install again succeeds
On an updated controller from 9 to 10:
[root@overcloud-controller-0 heat-admin]# grep python-networking-bigswitch /var/log/yum.log
Jun 19 12:03:26 Updated: 2:python-networking-bigswitch-9.42.1-3.el7ost.noarch
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.
https://access.redhat.com/errata/RHBA-2017:1594
Created attachment 1276855 [details] showing that update fails while remove install succeeds