[FIX] ambiguity between multiple foreign keys
[FIX] ambiguity between multiple foreign keys

mic4ael/indico,mvidalgarcia/indico,DirkHoffmann/indico,mvidalgarcia/indico,pferreir/indico,pferreir/indico,ThiefMaster/indico,OmeGak/indico,mic4ael/indico,indico/indico,OmeGak/indico,mvidalgarcia/indico,DirkHoffmann/indico,mic4ael/indico,ThiefMaster/indico,DirkHoffmann/indico,OmeGak/indico,ThiefMaster/indico,pferreir/indico,DirkHoffmann/indico,pferreir/indico,mvidalgarcia/indico,OmeGak/indico,indico/indico,indico/indico,ThiefMaster/indico,indico/indico,mic4ael/indico