Migrate legacy event/contribution id mappings
Migrate legacy event/contribution id mappings

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