Every day I check for Tumbleweed updates using zypper dup --no-allow-vendor-change

A few days ago I accepted the update which performed:
gtk3-schema-3.24.11-1.1 new install
gtk4-schema-3.96.0-1.1 upgrade

Next day I accepted the update which performed:
gtk3-schema removed
gtk4-schema 3.94.0-2.4 downgrade

Next day I accepted the updated which performed:
gtk3-schema-3.24.11-1.1 new install
gtk4-schema-3.96.0-1.1 upgrade

I thought it was kind of odd, but left it at that. Today I checked for updates and went through the same sequence. Is there a way to get out of this cycle?

Another kind of related question. When I installing updates sometimes it is requested that I have the installation DVD. The update cannot be completed without the DVD. Is there a way to stop that request for the installation DVD?

Thank you for any help.