delete a field help?

I have a user who has submitted a survey twice, and I have to delete the second entry.
But every user has a UserID and the data for the second submission has the same UserID (the only thing different is the fact she submitted data 5 seconds later)as this is one of the unique values used in many tables.
So I have deleted data in other tables but If I try to delete it from this particulat table I can't as I am really trying to delete that ID, so how can I get rid off that record?

The record is in a view if that makes any difference.

There should never be duplicate rows in a table. Each table should have it's own primary key that makes each record within the table unique.

You should redesign your table to add a primary key column, with a data type of Identity or UniqueIdentifier.