The problem was on getStaticPaths function, instead of passing the id, I passed the object

export async function getStaticPaths() { 
   const productsIds = await prisma.product.findMany(); 
   return {
      paths: productsIds.map((id) => ({
      params: { id: id.toString() },
    })),
fallback: true, // false or "blocking"
};

The correction:

export async function getStaticPaths() {
const productsIds = await prisma.product.findMany({
    select: {id: true},
  });

  return {
    paths: productsIds.map((product) => ({
      params: { id: product.id.toString() },
    })),
    fallback: 'blocking', // false or "blocking"
  };
}