`CustomField::OrderStatements` handles multi-value custom fields for formats `string`, `text`, `bool`, `link` and `date`. Begin of the deletion
End of the deletion UI Begin of the insertiondoesn'tEnd of the insertion Begin of the deletion doesn'tEnd of the deletion allow setting multi value for those formats, also there Begin of the insertiondoesn'tEnd of the insertion Begin of the deletion doesn'tEnd of the deletion seem to be any restriction in controller or model. Begin of the deletion
End of the deletion Also `CustomField#multi_value_possible?` lists only `version`, `user` and `list` as possible for multi-value.

Should Begin of the insertion`CustomField`End of the insertion Begin of the deletion CustomFieldEnd of the deletion validate multi value field and should we remove handling of multi value from order statements?