REP-31815: At least one field must be displayed per group.
Cause: This problem is due to: 1) This field has been specified as a group field. 2) The group of this field has been defaulted, and this field is the only one that has been marked as "to be defaulted" in its group.
Action: 1) If this field has been specified as a group field, go to the group page to deselect this field. 2) If the group of this field has been default, go to the group page to deselect that group.
Level: 1
Impact: Other