RSSFeed plugin MySql field error

I’ve been using RssFeed plugin successfully for years, but for the last couple of months the event log has been reporting this error after completion of each run:

XXXX - Database error 1054 while doing query  Unknown column 'index_1' in 'field list'
XXXX - Sql error update tmd_message set index_1 = "" where id = 976

The field index_1 does not exist, but I can’t find what is trying to call it.

The error does not seem to interfere with the operation of the plugin, but I would prefer to clean up the error if I can be advised how to do it. Thanks.

@hhadmin It is a known problem introduced in phplist release 3.3.1. See

The problem has since been fixed but no new release of phplist yet.