"Duplicate entry" error for the feed - after manually changing the alias for an item

This problem arises when you uncheck the Automatic alias box and type a new alias in. The feed alias doesn't get modified.

This means that you can create a new item (e.g. node) which will have the same generated URL alias as the original alias of the item (node) whose alias we renamed. The node aliases are fine, but pathauto will try to create an alias for the feed, only because the old feed alias didn't get renemaed we have a duplicate.

This is not as unlikely a use case as it may sound - I was manually replacing one node by a new one because I wanted to change the node type, so I renamed the alias for the old one so that the new node would get its new alias automatically --> error.

Full error text follows:

user warning: Duplicate entry 'xxxxxx/feed-en' for key 2 query: INSERT INTO url_alias (src, dst, language) VALUES ('node/25/feed', 'xxxxxx/feed', 'en') in /home/gelstle/public_html/general-ad101/modules/path/path.module on line 112.

This looks similar to one or two other issues in the queue but there may be some differences.