In one lotus article, for 4.6 v...you have it:
10. All of the required fields in the request have not been signed.
This request, which should not occur under normal circumstances, can appear as a response in the Administration Requests database. It indicates that an unauthorized person or a non-Notes program edited a posted request. This can indicate a failed security attack. Resubmit the request from the Public Address Book.
look here: http://support.lotus.com/sims2.nsf/eb5fbc0ab175cf0885256560005206cf/ab5c0cf523ff0629852565560051bfd4?OpenDocument&Highlight=0,All,the,required,fields,have,admin4
here have more: http://support.lotus.com/sims2.nsf/eb5fbc0ab175cf0885256560005206cf/ad342e25524d52b4852564c60061c274?OpenDocument&Highlight=0,All,the,required,fields,have,admin4