vmError: VmTableData Sef Alias in record is missing! Can't save the record with no Sef Alias.
Did you search the forum?
http://forum.virtuemart.net/index.php?topic=123270
http://forum.virtuemart.net/index.php?topic=123194.msg420640#msg420640
http://forum.virtuemart.net/index.php?topic=123271
Sounds like you have an out of date PHP version.