[itsm] Date fields in Item Configurations

Hi, I'm from Buenos Aires, and we are testing OTRS to implement it in the company I work. I've created a new Configuration Item Class and I added the fields I need. Among these fields there some date fields, and I want to know if it's possible to make these date fields optionals. When I edit the Configuration Item only a few date fields are completed (the rest are not filled) and when I save the item all the fields are saved even the fields that was not filled. Please let me know if more details are needed. Thanks and sorry for my english. Regards. Daniel. _________________________________________________________________