Cache look up failure - Mailing list pgsql-sql

Hi All, I am trying to insert  a tuple in the tuple, and i am getting
the follwoing error message:

fliprdb=# insert into collection(name, artist_id) values('El Baile
Aleman',2);
ERROR:  fmgr_info: function 24011: cache lookup failed

Can someone help me out here. Thnaks in advance  for your help.
Najm