Why is the output of yum list different in RHEL 8?

Issue

• Why I use "yum list [Package] --showduplicates" to get different results on the two RHEL8 servers which are all registered and have the same official yum repository, same channel?
• The two RHEL 8 servers have different results such as below:

# yum list containers-common --showduplicates
Updating Subscription Management repositories.
Last metadata expiration check: 0:09:24 ago on Sun 07 Mar 2021 04:50:22 PM CST.
Installed Packages
containers-common.x86_64 1:1.1.1-3.module+el8.3.0+8221+97165c3f               @rhel-8-for-x86_64-appstream-rpms
Available Packages
containers-common.x86_64 1:0.1.32-3.git1715c90.module+el8.0.0.z+3525+56c076c3 rhel-8-for-x86_64-appstream-rpms
containers-common.x86_64 1:0.1.32-3.git1715c90.module+el8.0.0+2958+4e823551   rhel-8-for-x86_64-appstream-rpms
containers-common.x86_64 1:0.1.32-3.git1715c90.module+el8.0.0+4017+bbba319f   rhel-8-for-x86_64-appstream-rpms
containers-common.x86_64 1:0.1.32-3.git1715c90.module+el8+2769+577ad176       rhel-8-for-x86_64-appstream-rpms
containers-common.x86_64 1:0.1.37-5.module+el8.1.0+4240+893c1ab8              rhel-8-for-x86_64-appstream-rpms
containers-common.x86_64 1:0.1.37-6.module+el8.1.0+4876+e678a192              rhel-8-for-x86_64-appstream-rpms
containers-common.x86_64 1:0.1.40-8.module+el8.1.1+5351+506397b0              rhel-8-for-x86_64-appstream-rpms
containers-common.x86_64 1:0.1.40-10.module+el8.2.0+5955+6cd70ceb             rhel-8-for-x86_64-appstream-rpms
containers-common.x86_64 1:0.1.40-11.module+el8.2.0+6374+67f43e89             rhel-8-for-x86_64-appstream-rpms
containers-common.x86_64 1:1.0.0-1.module+el8.2.1+6676+604e1b26               rhel-8-for-x86_64-appstream-rpms
containers-common.x86_64 1:1.1.1-3.module+el8.3.0+8221+97165c3f               rhel-8-for-x86_64-appstream-rpms
containers-common.x86_64 1:1.2.0-9.module+el8.3.1+9857+68fb1526               rhel-8-for-x86_64-appstream-rpms

• But the other one is:

# yum list containers-common --showduplicates
Updating Subscription Management repositories.
Last metadata expiration check: 0:12:03 ago on Sun 07 Mar 2021 04:50:22 PM CST.
Installed Packages
containers-common.x86_64 1:1.1.1-3.module+el8.3.0+8221+97165c3f              @rhel-8-for-x86_64-appstream-rpms
Available Packages
containers-common.x86_64 1:0.1.32-3.git1715c90.module+el8.0.0+2956+30df4692  rhel-8-for-x86_64-appstream-rpms 
containers-common.x86_64 1:0.1.32-3.git1715c90.module+el8.0.0+4014+8662b6b2  rhel-8-for-x86_64-appstream-rpms 
containers-common.x86_64 1:0.1.32-3.git1715c90.module+el8+2650+e6b3d617      rhel-8-for-x86_64-appstream-rpms 
containers-common.x86_64 1:0.1.32-4.git1715c90.module+el8.2.0+6370+6fb6c8ca  rhel-8-for-x86_64-appstream-rpms 
containers-common.x86_64 1:0.1.32-5.git1715c90.module+el8.1.0+4241+a7060183  rhel-8-for-x86_64-appstream-rpms 
containers-common.x86_64 1:0.1.32-6.git1715c90.module+el8.1.0+4903+9bde5d6c  rhel-8-for-x86_64-appstream-rpms 
containers-common.x86_64 1:0.1.32-6.git1715c90.module+el8.3.0+8236+8e428216  rhel-8-for-x86_64-appstream-rpms 
containers-common.x86_64 1:0.1.32-6.git1715c90.module+el8.3.0+10171+12421f43 rhel-8-for-x86_64-appstream-rpms