some parameters are automatically created by Windchill during the approval process.The value of this parameter is uneditable for CREO parametric since this is a windchill parameter. If the parameter is placed in a cell of table in title box, it should be uneditable (i.e. user should not be able to remove parameter from cell ). Otherwise the parameter will be removed and the cell content can be filled manually. e.g. if a cell has a life cycle state parameter, even before the release of the drawing it can be manually entered as 'released' by removing parameter.