Then, the club declined, and in 1963, it merged with White Star Woluwé A.C. to avoid bankruptcy. The new club was then called Royal Racing White. It was decided that this club would keep the matricule N°47 of White Star Woluwé. Thus to avoid that the matricule n°6 of Royal Racing Club de Bruxelles (as it was named since 1921) was erased, the club exchanged its matricule with that of K. Sport Sint-Genesius-Rode.
In 1963, La Rhodienne came into play to keep Racing Brussels' matricule n°6 alive. On June 21, 1963, Racing Club changed its name to Royal F.C. La Rhodienne, keeping the matricule n°6. On the next day, K. Sport Sint-Genesius-Rode (matricule n°1274) changed its name to Royal Racing Club de Bruxelles. On June 23, the club wearing the matricule N°6, which had just been renamed to Royal FC La Rhodienne, now changed its name to K. Sport St-Genesius-Rode. The clubs had effectively changed names, so although the original Racing Club merged into R. Racing White in 1963, it was effectively the matricule n°1274 that merged, and the old matricule 6 was kept alive in a different club.