Why is my image not deleted after i sent Duplicate report?

wardex101
Solar Supporter - Fought against the New Lunar Republic rebellion on the side of the Solar Deity (April Fools 2023).
Artist -
Wallet After Summer Sale -

Hi.
I have uploaded image(https://derpibooru.org/images/2731939?q=discorded) and i find out that i saw one small error(twilight’s cutie mark) on this image.
So i uploaded image(https://derpibooru.org/images/2731941?q=discorded) again to remove this error.
Then i send duplicate report to delete this image.
After i send duplicate report, 2 hours later, Image(https://derpibooru.org/images/2731939?q=discorded) was still not deleted.
Why is taking so long to delete this image(https://derpibooru.org/images/2731939?q=discorded)?
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