I stumbled on this, too while creating HABApp:
Field 'editable' could not be eliminated: Can not set boolean field org.eclipse.smarthome.io.rest.core.item.EnrichedItemDTO.editable to null value
Can easily be reproduced through the rest-api interface.
Just make a GET request for items with the fields “state,type,name” or use this link
http://localhost:8080/rest/items?recursive=false&fields=state%2Ctype%2Cname