Hello, Before couple of minutes I ve got update notification. I wanted install update using Terminal (as I always do), and there was nothing to do… In software updater (rigft-bottom corner) was message that I post below like picture.
What is wrong? Why this update can not be realised?
Thank you for answering my questions
With zypper up ?. Then you can trust that.
yes.
sudo zypper update
Thank you for advice. I will do like I did it before. I just wanted to check if something else is necessary to be done.
My personal idea: remove that update icon. 
There are several threads here in the forum.
There’s a whole thread on this issue:
Leap 15.6 broken update.
You see the problem when using “zypper patch” but not when using “zypper update”. It will probably be fixed in the next few days.
Yes, because zypper update silently skips the packages that cannot be installed. The problem is still there - you cannot install this update.