Somehow I have ‘Death Date’ duplicated in the Column Editor for the category People Tree View.
How this has happened I have no idea. Maybe by trying to rearrange the column order?
In the array ‘rank’ the value ‘5’ was duplicated.
I manually edited the file so only one value of ‘5’ and added ‘14’ as well.
Also changed the array ‘visible’ to only contain one ‘5’.
Now I have ‘Last changed’ back and only one occurence of ‘Death Date’.
To test it, you should move the ini file to a safe location with Gramps closed. Then relaunch Gramps to see how it recreates the ini file using its default settings. Does 5 reappear twice in the new file?
Don’t forget to return the ini file with your settings to the folder after closing Gramps.