By not pretending SotS doesn’t exist and owning up to the mistakes that were made. As stated before, Disney had a big hand in creating stigma surrounding the film. They won’t officially release the movie and won’t give those who’ve never seen it a chance to watch it. And now when people Google SotS, they will not only see that it’s racist, but they will find that Disney is hiding it and therefore can’t watch it (not legally, at least). That creates more tension and strengthens the stigma, when Disney could have been doing things to lessen the stigma. But they refuse. They’ve had nearly 80 years to correct the issue, but they don’t want to.