I note that a recent update ends with:
Problem 1: cannot install the best update candidate for package hplip-3.18.3-1.fc28.x86_64 - nothing provides libnetsnmp.so.35()(64bit) needed by hplip-3.18.6-11.fc28.x86_64 Problem 2: cannot install the best update candidate for package hplip-libs-3.18.3-1.fc28.x86_64 - nothing provides libnetsnmp.so.35()(64bit) needed by hplip-libs-3.18.6-11.fc28.x86_64 Problem 3: problem with installed package hplip-libs-3.18.3-1.fc28.x86_64 - package hplip-libs-3.18.3-1.fc28.x86_64 requires hplip-common(x86-64) = 3.18.3-1.fc28, but none of the providers can be installed - cannot install both hplip-common-3.18.6-11.fc28.x86_64 and hplip-common-3.18.3-1.fc28.x86_64 - cannot install both hplip-common-3.18.3-1.fc28.x86_64 and hplip-common-3.18.6-11.fc28.x86_64 - cannot install the best update candidate for package hplip-common-3.18.3-1.fc28.x86_64 - nothing provides libnetsnmp.so.35()(64bit) needed by hplip-libs-3.18.6-11.fc28.x86_64
My understanding is that the source of this problem is this:
Looking at the packages list I see that the recent update did Fedora Update Notification FEDORA-2018-e7d66d4d3f 2018-12-16 02:24:11.770826 Built with new net-snmp but the new net-snmp package was provided only to fc29 two weeks ago. Fedora Update Notification FEDORA-2018-042156f164 2018-12-02 08:24:31.362863 Update to net-snmp-5.8.