I have Jaikoz configured to only write the composer tag from Discogs when the field is empty, but I have noticed that it writes the tag even when the field has value. Because of this, the field value from Musicbrainz is automatically overwritten every time I import data. I tried with some other fields like Producer and I get the same results. Even when Discogs is configured to modify the field only when empty, it writes the tag values from Discogs all the time. I also noticed that if I set the composer tag to 'Never modify' in Discogs, it will empty the value of the field when I import data from Discogs.