Grid diffrent labels in Group By function

Hi,
I have different applications “grid views with Group By function”
Group by a Date with different formats Year/Month/Week
In one application it works fine
grafik

in an other application I got the problem with the label
grafik

had the same. look for the fields option in the group by . there you can change the names shown. If you change the group by again. you probably have to do this again.

Thank you, your hint was helpful,
I removed the fields from the group by definition and add them again
and now it works