Who started “Banksy's Self-Shredding Painting”?

Banksy, on Retail, Oct 5, 2018. It reached 8 platforms in 3.0 years.

LineageKey steps, 12 of 17. Lines follow time and platform
Sotheby's Gets Banksy'ed at Contemporary Art Auction in LondonBanksyFirst postSotheby’s 'Banksy-ed' as painting 'self-destructs' live at auctionThe Art NewspaperPressPlatform jumpPlatform jumpPeakPlatform jumpOwner responsePressOwner responsePlatform jumpAfterlifeCommercialPatient zero