InfoPath Dev

deleted the form form the server. then able to delete the column. published old form with no reference to old column. fixed.

"The SharePoint list form can't be customized with InfoPath because fields of an unsupported data type are marked as required, or because fields are corrupted. In SharePoint, try deleting the columns or editing the column properties to remove the required attribute. - my_fieldname (Lookup)" IN the field in infopath it says ...