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After more than 13 years, and tens of thousands of questions, Moz Q&A closed on 12th December 2024. Whilst we’re not completely removing the content - many posts will still be possible to view - we have locked both new posts and new replies. More details here.
Another thing to consider is that if you do have an image ranking within the SERPS that you don't change the filename at all - I've seen that it takes google's bot(s) much longer to reindex an image that's filename has changed vs like some content change or meta title etc