Getting yum errors

pgdg92-source/primary_db                                           |  25 kB     00:00
http://yum.postgresql.org/srpms/9.2/redhat/rhel-5-x86_64/repodata/primary.sqlite.bz2: 
[Errno -3] Error performing checksum
Trying other mirror.
Error: failure: repodata/primary.sqlite.bz2 from pgdg92-source: [Errno 
256] No more mirrors to try.

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