It seems that somehow you ended up with many individual packages version 6.42.3 installed. In addition to that you have ROS bundle version 6.37.3 with most packages disabled.
First of all, make backup and
configuration export and save the two files off device.
Then try to uninstall "package" routeros-x86 ... if that works, you'll get rid of most of old packages. Then upload only ipv6 package version 6.42.3 (you can get individual package files from "other packages" ZIP, available in MT's download page). If you fail to get that package of particular version, you can uninstall ipv6, upgrade to 6.42.11 (last long-term) and install ipv6 ...
Another possibility is to disable 6.42.3 packages and enable 6.37.3 counterparts. After reboot you should be able to uninstall all 6.42.3 packages.
If uninstallation of one of ROS versions doesn't succeed, then I'm affraid you'll have to netinstall the device. I'm not sure how that goes for x86.
The last thing: it seems that MT is shifting from bare-metal x86 towards virtual environmenrs (CHR) ... you might want to ask firstname.lastname@example.org
about possibility to transfer ROS license from x86 to CHR.