Realtime register


I really need some help here.

It appears to be in the notify packet when a user registers.

It is -

Got SIP response 489 “Bad Request” back from

Since it only seems to happen on those where a useragent variable is not stored in the database I am guessing it is this error.

First off, what effect will it have.
Second, how can I stop Asterisk asking for the useragent.