Ok the new commands worked perfectly. Thank you very much!
[root@smeserver-10 ~]# yum downgrade libtevent --disablerepo=* --enablerepo=sme
updates-testing,smeos,smeupdates
Loaded plugins: fastestmirror, post-transaction-actions, smeserver
Loading mirror speeds from cached hostfile
* smeos: mirror.canada.pialasse.com
* smeupdates: mirror.canada.pialasse.com
* smeupdates-testing: mirror.canada.pialasse.com
Resolving Dependencies
--> Running transaction check
---> Package libtevent.x86_64 0:0.9.28-1.el7 will be a downgrade
---> Package libtevent.x86_64 0:0.9.31-2.el7_4 will be erased
--> Finished Dependency Resolution
Error: Package: python-tevent-0.9.31-2.el7_4.x86_64 (@smeupdates)
Requires: libtevent(x86-64) = 0.9.31-2.el7_4
Removing: libtevent-0.9.31-2.el7_4.x86_64 (@smeupdates)
libtevent(x86-64) = 0.9.31-2.el7_4
Downgraded By: libtevent-0.9.28-1.el7.x86_64 (smeos)
libtevent(x86-64) = 0.9.28-1.el7
You could try using --skip-broken to work around the problem
You could try running: rpm -Va --nofiles --nodigest
[root@smeserver-10 ~]# rpm -q libtevent
libtevent-0.9.31-2.el7_4.x86_64
[root@smeserver-10 ~]# yum update smeserver-yum --enablerepo=smeupdates-testing -y
Loaded plugins: fastestmirror, post-transaction-actions, smeserver
Loading mirror speeds from cached hostfile
* base: mirror.netflash.net
* smeaddons: mirror.canada.pialasse.com
* smeextras: mirror.canada.pialasse.com
* smeos: mirror.canada.pialasse.com
* smeupdates: mirror.canada.pialasse.com
* smeupdates-testing: mirror.canada.pialasse.com
* updates: mirror2.evolution-host.com
No packages marked for update
[root@smeserver-10 ~]# signal-event yum-modify
[root@smeserver-10 ~]# yum downgrade libtevent python-tevent --disablerepo=* --
enablerepo=smeupdates-testing,smeos,smeupdates
Loaded plugins: fastestmirror, post-transaction-actions, smeserver
Loading mirror speeds from cached hostfile
* smeos: mirror.canada.pialasse.com
* smeupdates: mirror.canada.pialasse.com
* smeupdates-testing: mirror.canada.pialasse.com
Resolving Dependencies
--> Running transaction check
---> Package libtevent.x86_64 0:0.9.28-1.el7 will be a downgrade
---> Package libtevent.x86_64 0:0.9.31-2.el7_4 will be erased
---> Package python-tevent.x86_64 0:0.9.28-1.el7 will be a downgrade
---> Package python-tevent.x86_64 0:0.9.31-2.el7_4 will be erased
--> Finished Dependency Resolution
Dependencies Resolved
================================================================================
Package Arch Version Repository Size
================================================================================
Downgrading:
libtevent x86_64 0.9.28-1.el7 smeos 34 k
python-tevent x86_64 0.9.28-1.el7 smeos 17 k
Transaction Summary
================================================================================
Downgrade 2 Packages
Total download size: 51 k
Is this ok [y/d/N]: y
Downloading packages:
(1/2): libtevent-0.9.28-1.el7.x86_64.rpm | 34 kB 00:00
(2/2): python-tevent-0.9.28-1.el7.x86_64.rpm | 17 kB 00:00
--------------------------------------------------------------------------------
Total 91 kB/s | 51 kB 00:00
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
Installing : libtevent-0.9.28-1.el7.x86_64 1/4
Installing : python-tevent-0.9.28-1.el7.x86_64 2/4
Cleanup : python-tevent-0.9.31-2.el7_4.x86_64 3/4
Cleanup : libtevent-0.9.31-2.el7_4.x86_64 4/4
Verifying : python-tevent-0.9.28-1.el7.x86_64 1/4
Verifying : libtevent-0.9.28-1.el7.x86_64 2/4
Verifying : libtevent-0.9.31-2.el7_4.x86_64 3/4
Verifying : python-tevent-0.9.31-2.el7_4.x86_64 4/4
Removed:
libtevent.x86_64 0:0.9.31-2.el7_4 python-tevent.x86_64 0:0.9.31-2.el7_4
Installed:
libtevent.x86_64 0:0.9.28-1.el7 python-tevent.x86_64 0:0.9.28-1.el7
Complete!
[root@smeserver-10 ~]# rpm -q libtevent
libtevent-0.9.28-1.el7.x86_64
[root@smeserver-10 ~]# samba --version
Version 4.4.4
[root@smeserver-10 ~]#