I assume Anthropic already contacted the affected companies and negotiated some settlement before releasing this. Unlike a lot of other commenters, I think these mistakes were actually mistakes and accepting a settlement is better than releasing the lawyers guns blazing.
I hope someone does sue soon. The AI companies are making a very dangerous technology deliberately, and at minimum should be accountable for those dangers. Some will really try not to be as we get further into this - just as previous examples like tobacco companies.