Problem with @MappedSuperclass and associations

I have a project with global entities(Lib\Shared\Main - @MappedSuperclass ) and local entities(Shared\Main) which extends the globals.

The following DQL is returning wrong SQL:

SELECT Horoscope FROM Shared\Main\Horoscope Horoscope JOIN Horoscope.sign Sign WHERE Sign.id = 7

SELECT h0_.id AS id0, h0_.date AS date1, h0_.contents AS contents2, h0_.signId AS signId3 FROM horoscopes h0_ INNER JOIN global.sys_zodiac_signs g1_ ON h2_.signId = g1_.id WHERE g1_.id = 7

The attached zip contains the entity files.

What is the correct way to extends entities and to build JOINed requests

Have a nice day