The history change was probably to avoid violating the LGPL. If any contributors don't agree with the change (or you don't want to do the onerous task of getting consensus as required) you should remove their contributions from the work you make closed source as the contributions still come under LGPL until the original author consents to the change.
That's incorrect in that you have to remove the contributions from source code or get permission. Rewriting git history doesn't get permission or remove history. It just hides it.
The history change was probably to avoid violating the LGPL. If any contributors don't agree with the change (or you don't want to do the onerous task of getting consensus as required) you should remove their contributions from the work you make closed source as the contributions still come under LGPL until the original author consents to the change.
Or at least that's what people said here.
That's incorrect in that you have to remove the contributions from source code or get permission. Rewriting git history doesn't get permission or remove history. It just hides it.