New column is not saved

I have set up a new column that inserts tags from two other columns:

Name: KompWerk
Value: $if(%work_year_sort%,%work_year_sort% %group%,)
Field: %KompWerk%

The entries are properly. Only they are not saved. Marking and saving album is unsuccessful. The only previous option: Click each individual entry of the column for editing. With over 30,000 tracks ...

Completely new albums work properly.

If you set up a new column, you only will SEE the content of the entries in Value in the File List.
This will not save or change anything automatically, AFAIK.

If you want to fill the custom field KompWerk with the content of your current Value, I suggest to use an Action.

OK Thanks for the answer.