index row requires 10040 bytes, maximum size is 8191

[akp geek <akpgeek@xxxxxxxxx>]

Hi all -

            I am trying to create an index on character varying field.  The column is just character varying with no limit. I am getting the following error " index row requires 10040 bytes, maximum size is 8191"

What can I do the postgres.conf to handle this error? Appreciate your help

Regards