Old Wine Stain in Carpet

I have a hand made carpet from India that I love. I bought it when I was a young man for several thousand dollars in the early 1980s. I expect it is worth twice what I paid now. However being foolish and fond of wine back then I spilled a bottle of wine into the central lighter field of the carpet – about one square foot in diameter. I had the carpet professionally cleaned a couple of years ago and it was rolled up ever since. Now I just unrolled it and I see the stain is still there. It looks like rust now. I presume there is nothing to do to restore it being that the stain is so very old?

By streaker |