Chech interval is Daily for software updater. I get however every hour a system bell sound for that

Hello,

I run openSUSE Leap 42.1, with Plasma5, on my Medion Akoya laptop. Eveyting worked oke untill last week. At that moment the updater failed to load the updates.
Further investigation turned out that it was caused by one update, namely flash-plugin (11.2.202.548-release). I raised bug 956160 for that problem. Since that moment I get every hour a system bell as result of the system updater since there is still 1 update available that I can not upload becase of bug 956160, while check interval is Daily for software updater.

How can I reduce or switch-off this bell signal (iritating in this frequency)

On my other desktops, with leap 42.1/ Plasma5 on it, bug 956160 does not occur.

Regards, Frans