Estimated amount on Extension form 4868 is incorrect

I've already filed my extension (Form 4868) for 2024 and it has been approved.

However, I just received another K-1 and I owe more money than I had originally estimated on my Form 4868.

I had set up a payment via IRS Direct Pay for the estimated amount on Form 4868 (but it will not withdraw until 4/15/25).

 

Can I just modify my payment on the Direct Pay site, so that it is withdrawing the larger estimated amount, and ignore the fact that my extension Form 4868 has a different value that I said I'd pay? (I'm assuming there's no way to change Form 4868 once it's been accepted.)

 

Thanks.