- will report duplicate group names, and running it with --resolve will fix
- duplicates by appending the group id to the name.
+will report duplicate group names, and running it with --resolve will fix
+duplicates by appending the group id to the name.
+
+Nota Bene: As a result of differing indexes in the schema files, Postgres and
+SQLite RT databases have enforced group name uniqueness for many years at the
+database level.
+
+=back
+
+
+
+=head1 UPGRADING FROM 4.0.5 AND EARLIER
+
+=head2 Schema updates
+
+The fix for an attribute truncation bug on MySQL requires a small ALTER TABLE.
+Be sure you run `make upgrade-database` to apply this change automatically.
+The bug primarily manifested when uploading large logos in the theme editor on
+MySQL. Refer to etc/upgrade/4.0.6/schema.mysql for the actual ALTER TABLE
+that will be run.
+
+
+=head2 Query Builder