[Koha] Newbie Questions2

I have overcome the first problem whereby some fields were refusing to be edited. However when I try to save a new marc record I am still getting error message "Tag "" is not a valid tag. at /usr/share/koha/lib/C4/Biblio.pm line 1863". Is there somewhere I am missing? Ephraim ---------------------------------------------------------------- This message was sent using IMP, the Internet Messaging Program.