Important Security Update Error

[John Graddy]

I have been out of town for a while, and, when I returned, I had a lot
of system updates waiting for me.  When I tried to install the updates,
one of them (labeled as an "Important Security Update" got the following
error message:

W: Failed to fetch
http://security.ubuntu.com/ubuntu/pool/main/t/tiff/libtiff4_3.8.2-11ubuntu0.9.04.1_i386.deb
  404 Not Found

Is this something that I should worry about?  Unfortunately, the Update
Manager keeps coming back to try to install this failed update.  Can I
stop this from happening?

Thanks,
John