You cannot "replace" them, but you can delete the old one and then re-submit the new one.

But be aware that there is still a risk that the new one might be rejected for being "too similar" and you do not even know which image Adobe thinks it's too similar to.

I went from a 99% acceptance rate for years to a 90% rejection rate. Almost everythin gets rejected now including images where I absolutely do not have any even slightly similar images in my portfolio. It's like "oh, you already have ONE photo of a dog in your portfolio? Now you are not allowed to ever have a photo of a dog in your portfolio ever again, because that's too similar."

I am not denying that I have few similar looking images from the same shoot in my portfolio.  I am not going to spend money on props, set up my lamps, backgrounds, etc. arrange an image and then just take exactly ONE single image. That's not worth the effort and money. Just like when you book a model you would not do so if you were told that you are only allowed to submit ONE Image with that model. That's just not economic. Of course you will try to get the most out of it and yes, that might lead to a few similar looking images - though from my experienve there are customers who are looking for exactly that.

But for me Adobe isn't just rejecting images where I already have "similar looking" images in my port. They are literally rejecting everything where I already have a similar topic in my port, even if the photo itself looks completely different.

The "similar" thing they've brought in appears massively flawed.  A lot of people are finding images flagged with no similar ones in the collection and no real theme or hint.
Suspicion is they've introduced some flawed AI thats making these random decisions based on incorrect data or training.

Some people are lucky, or... maybe friends for Adobe.
Adobe loves and protects AI prompters...
here I quote myself, a ten months old message:

Quote from: Sean Locke Photography on June 25, 2024, 16:15

Quote from: blvdone on June 22, 2024, 07:00

That week I had about $200 in sales.  Around 12,000 images in portfolio.  Only $1/wk for 4,000 assets is pretty bad honestly.  If you can post your portfolio, I can give you an advice.  My portfolio is below.

https://stock.adobe.com/search?creator_id=203855208

Nice portfolio.

Nice portfolio???  And he feels well placed for giving advices!  wow
Not sure that Rafale mode users are Gods

I must admit that I submit sometimes 2, 3 variations of a same subject.

But this
https://stock.adobe.com/fr/search?order=relevance&serie_id=485406634&order=relevance&serie_id=485406634
is far beyond the limit. Size does matter, for a certain type of portfolio.

If I did this, I would not feel at ease to come in and whine that my account has been blocked... and proclaim to all immaculate innocence (and not the slightest doubt about the blind compassion of all).

Account and submission guidelines
https://helpx.adobe.com/stock/contributor/help/submission-guidelines.html

Content spamming
Content spamming, which includes sending multiple submissions of identical or almost identical files, is not allowed. Discover the difference between useful content variations and content that is considered spam here.

https://helpx.adobe.com/stock/contributor/help/similar-vs-spamming.html
Similar content is one of the leading reasons we reject content. Sending multiple copies of identical content can be perceived as image spam, and can result in your account being blocked or permanently closed.

Quote from: Uncle Pete on April 06, 2025, 13:59

t. For all I know, it could be, too many images like that, and the similar is like the "Quality Issues" which is just a generic rejection.

If that's the case, then the rejection reason should reflect this. For me the rejection reason literally says "we found that your image resembles other images you have already uploaded."

You are correct, but we have been told, that similar may mean, similar to other images, already accepted. Like some other issues and questions, a clear and straight answer would be nice. We don't get that.

Either way its a complete random crapshoot now.

That's the real answer. Whether it's random, AI, based on similar to others or something else, which we are not informed of the facts or the truth, "its a complete random crapshoot" where analysis, reason or logic, don't help anything.