How can I get a bankruptcy removed from my credit report?

I filed in 2001. I disputed my bankruptcy and a lien with all 3 credit bureaus.
Transunion removed the lien not the bankruptcy
Equifax removed the bankruptcy and not the lien
Experian wouldn’t remove neither one.

Now i know once you dispute an item the creditor has 30 days to respond or its removed from your file how can i get the others removed or do I just have to wait it out

If one bureau remove it dont the others have too.