[Catalyst] flash with DBIC session storage

[Tobias Kremer]

While hammering my site with ab (Apache bench) I'm getting loads of the
the following error message:

Couldn't render template "undef error -
DBIx::Class::ResultSet::find_or_create(): DBI Exception:
DBD::mysql::st execute failed: Duplicate entry
'flash:4f1bddce6c7828c27b2e47265f614109d4c21f19'
for key 1 [for Statement "INSERT INTO sessions (id) VALUES (?)"
with ParamValues: 0='flash:4f1bddce6c7828c27b2e47265f614109d4c21f19']
at /usr/local/lib/perl5/site_perl/5.8.8/Catalyst/Plugin/
Session/Store/DBIC/Delegate.pm line 52"

Any ideas what's going on here and how to fix it?

Thanks!

--Tobias