Tried to upgrade the Centos and got this during the transaction test:
Transaction check error:
file /usr/bin/python3.6 from install of python36-3.6.6-5.el7.x86_64 conflicts with file from package python36u-3.6.7-1.ius.centos7.x86_64
file /usr/bin/python3.6m from install of python36-3.6.6-5.el7.x86_64 conflicts with file from package python36u-3.6.7-1.ius.centos7.x86_64
file /usr/lib64/python3.6/config-3.6m-x86_64-linux-gnu/Makefile from install of python36-libs-3.6.6-5.el7.x86_64 conflicts with file from package python36u-libs-3.6.7-1.ius.centos7.x86_64
file /usr/lib64/python3.6/logging/init.py from install of python36-libs-3.6.6-5.el7.x86_64 conflicts with file from package python36u-libs-3.6.7-1.ius.centos7.x86_64
file /usr/lib64/python3.6/test/support/init.py from install of python36-libs-3.6.6-5.el7.x86_64 conflicts with file from package python36u-libs-3.6.7-1.ius.centos7.x86_64
file /usr/include/python3.6m/pyconfig-64.h from install of python36-libs-3.6.6-5.el7.x86_64 conflicts with file from package python36u-libs-3.6.7-1.ius.centos7.x86_64
and a load of similar lines to this
file /usr/lib64/python3.6/pycache/_compat_pickle.cpython-36.opt-1.pyc from install of python36-libs-3.6.6-5.el7.x86_64 conflicts with file from package python36u-libs-3.6.7-1.ius.centos7.x86_64
I have tried yum clean all and still no joy