If anything, this adds to the art, for now we have an even bigger cultural and historical context. It adds an extra layer and makes it even more significant.
Don't believe me? Think about Banksy's destructive piece that shredded before people's eyes. Artwork that more than doubled after being destroyed.
Or stolen artwork that's missing becomes even more valuable.
Artwork is ever evolving around the context of its original creation. That's its power.