There's a number of things one can say to manage reputation. "That's a terrible work." "I disown that." "Better off burned." "Not part of my catalog." But "I didn't paint that" is a statement of fact, it had better be true. One might consider an author who writes a book that flops. They can ask the publisher to stop printing it, but they can't demand people pretend that they didn't write it. However, there is the case where a movie director demands their name be taken off a bad movie. Fuzzy.