PDR1031S
<FIELD> fieldname has both <REFERENCE> and <FIELDREF> tags. Only one is allowed.
What happened: You specified a Field group that contains both a <REFERENCE> tag and a <FIELDREF> tag. The <FIELD> tag fieldname value is given.
What to do: If the Field group you are specifying references another field, remove the <REFERENCE> tag. Otherwise, remove the <FIELDREF> tag.