Leap 15.5 KDE3 start menu: missing internet group

Hello:I installed Leap 15.3 desktop-data-openSUSE package in my Leap 15.5 system.It shows the program groups in KDE3 start menu but the "internet" category is missing.In my Leap 15.1 it is between "graphics" and "multimedia" groups. Why is it and how could I fix it? The internet category is an important one, and now none of its application are shown in KDE3 start menu.Thanks,Istvan