Upgrade error "Unknown column..." despite using Pathauto dev.

Perhaps I should have left well enough alone, and heeded some cautionary messages, but I went ahead and first upgraded Pathauto to the dev. version, as recommended, and then upgraded Path Redirect. I encountered the php error below, and it's just gobblygook to me, but I thought I'd paste it here in case it's useful for someone else or the maintainer. My site seems to be working fine despite this error message (I've tested that it successfully does some of the same redirects it did before the upgrade). Is there any reason to be concerned?

Unknown column 'source' in 'where clause' query: SELECT rid FROM path_redirect WHERE source = 'admin/build/modules' AND language IN ('', '') ORDER BY language DESC, source DESC, rid DESC in [Drupal folder]/sites/all/modules/path_redirect/path_redirect.module on line 437.