Reproduce
Run current build of 6.0.9.0 and load any character. Click description tab, edit text into the "City" field then push save. Check the PCG file you wrote, CITY: will be blank.
Cause
Issue during the conversion from PCStringKey.RESIDENCE -> PCStringKey.CITY .
Solution
The bug in question can be fixed in PCGVer2Creator.java. Will take the time to rename other refs and update all but compatibility.
Linux, JDK 12