Found higher res of existing image, but can't upload

Seiken
Non-Fungible Trixie -
Artist -

So pretty much the title, i get following error:
This image has been uploaded before, sorry!
 
Picture in question is >>1572678  
Source higher res: https://kuroran.tumblr.com/post/166907468602
 
I get there are lots of optimization stuff going on in the background to keep everything smooth, though a simple resolution comparison would fix the issue, which shouldn’t be that taxing in addition to the match-finding that is already going on.
The Smiling Pony
Silly Pony - Celebrated the 13th anniversary of MLP:FIM, and 40 years of MLP!
Shimmering Smile - Celebrated the 10th anniversary of Equestria Girls!
Solar Hero - Went above and beyond for the Solar Deity, drawing from the power of the sun itself to bring balance to the fight against the Lunar Insurrection (April Fools 2023).
Roseluck - Had their OC in the 2023 Derpibooru Collab.
Flower Trio - Helped others get their OC into the 2023 Derpibooru Collab.
King Sombra - Celebrated the 10th anniversary of The Crystal Empire!
A Lovely Nightmare Night - Celebrated the 12th anniversary of MLP:FIM!
Princess of Love - Extra special version for those who participated in the Canterlot Wedding 10th anniversary event by contributing art.
Tree of Harmony - Drew someone's OC for the 2022 Community Collab
Elements of Harmony - Had an OC in the 2022 Community Collab

( ͠° ͟ʖ ͡° )
Unsure what was going on; an outright block like that only happens if the image hash is identical, so at some point we either had the large image and it was replaced (can’t find a report to explain that), or Tumblr did something weird.
 
(original image updated now; is preferred way to handle tumblr_raw shenanigans)
Kurozu
Wallet After Summer Sale -
Artist -

I’m having a similar issue from the same artist, or was when I tried to upload a few days ago.
 
Picture in question: >>1569822  
Full res from source
 
 
@The Smiling Pony  
(original image updated now; is preferred way to handle tumblr_raw shenanigans)
 
How should regular users go about this? Just by making a post about it in a thread, as opposed to reupload/merge?
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