One option you have is to go back to the copyright holders and tell them of the issue, including what the editor suggests. That might make the problem go away or, at least, reduce it a bit.
With that information you can go back to the editor and try to negotiate any additional issues. It takes a bit of time, of course, but so do most things in publishing.
I don't know whether you can insist on the exact wording the copyright holders asked for, or whether you should, or whether you or the journal faces legal consequences if you don't.
I suggest you write the editor quoting the specific requirements directly as they came to you in support of your wish to honor those requests. If the editor says no and there are ...