About Blu-ray sets that have double-stacked discs in them.

[sockableclaw]

You know how sometimes, you'll buy a Blu-ray set (or even a 4K set) and sometimes they'll have two discs stacked on top of each other on one side?

I know the preferable thing for many of us would be to separate them and put one of them in another case.

However, if I were to not do that and just leave them stacked on top of each other in the case, would that damage the disc on top over time?