Add Beer button broken

When a brewery (usually newly added) has none if its beers in the database yet (always accompanied by the "No beers added yet. Be the first!" or whatever message), clicking the first "Add beer" button on the brewery page yields a new webpage with a 404 error.

This first "Add Beer" button is distinct from the "Add a Beer" button lower down the page.

Either clearing the first button or having it redirect to the same URL as the second one would solve this.

Thanks.