pamamolf

  file /usr/lib64/python3.6/multiprocessing/pool.py from install of python3-libs-3.6.8-10.el7.x86_64 conflicts with file from package python36u-libs-3.6.7-1.ius.centos7.x86_64
  file /usr/lib64/python3.6/ntpath.py from install of python3-libs-3.6.8-10.el7.x86_64 conflicts with file from package python36u-libs-3.6.7-1.ius.centos7.x86_64
  file /usr/lib64/python3.6/platform.py from install of python3-libs-3.6.8-10.el7.x86_64 conflicts with file from package python36u-libs-3.6.7-1.ius.centos7.x86_64
  file /usr/lib64/python3.6/poplib.py from install of python3-libs-3.6.8-10.el7.x86_64 conflicts with file from package python36u-libs-3.6.7-1.ius.centos7.x86_64
  file /usr/lib64/python3.6/posixpath.py from install of python3-libs-3.6.8-10.el7.x86_64 conflicts with file from package python36u-libs-3.6.7-1.ius.centos7.x86_64
  file /usr/lib64/python3.6/pydoc.py from install of python3-libs-3.6.8-10.el7.x86_64 conflicts with file from package python36u-libs-3.6.7-1.ius.centos7.x86_64
  file /usr/lib64/python3.6/pydoc_

pamamolf

Do you want to run YUM install checks ?  [y/n]

This will increase your upgrade duration time wise.
Check the change log centminmod.com/changelog.html
to see if any Nginx or PHP related new additions
which require checking YUM prequisites are met.
If no new additions made, you can skip the 
YUM install check to speed up upgrade time.