Stacy Woods

I was married for about 25 years after that we divorced In 2015 and the judge granted her 1/2 of my 401k (QDRO). But then we married again and divorced in 2018 in which She failed to tell the judge or her lawyer that we had been married before And they granted her half of my 401K (QDRO). In which I just found out that you could only be granted that 1 time. Is that legal? And what can I do now?