From mcaspers: When an entity is defined twice, Publican will use the value of the first one. I'm not sure that there is any practical use case for this, so maybe the following should generate a warning: Entities = [ <!ENTITY TITLE "title"> <!ENTITY TITLE "title2"> ]
See https://bugzilla.redhat.com/show_bug.cgi?id=864616#c17 for some additional details.