Jag hittade svaret på frågan:
After the untimely death of her mother two years later, Caroline married Stefano Casiraghi in 1983. However, because her first marriage was not annulled by the Vatican until 1992, Caroline’s three children with Casiraghi (sons Andrea and Pierre and daughter Charlotte), were not considered ”legitimate” in Roman Catholic Monaco, and were technically disqualified from Monaco’s royal succession.
Tragically, Casiraghi died in 1990 in a speedboat accident. Two years later, the Vatican’s decision to annul Caroline’s first marriage restored her children to legitimate status.