Hello again!
I downgraded right now and got a partial downgrade. Then re-downgraded and device successfully booted. But when I checked installed titles with downgrade_checker, it showed that these titles are not in correct versions:
Code:
Title ID 0x0004009B00010402
Expected: 0x1002
Installed: 0x1402
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Title ID 0x0004003000009e02
Extra title
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Title ID 0x0004001B00010802
Expected: 0x0000
Installed: 0x0400
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Title ID 0x0004013000001B02
Expected: 0x0800
Installed: 0x0c01
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Title ID 0x0004013000001A02
Expected: 0x1400
Installed: 0x1801
However, I didn't find the last two titles in the New 3DS update packs at all, but found them in Old 3DS packs. When I placed files in the "updates" folder, and attempted to downgrade again with PlaiSysUpdater, I was immediately presented by this "error screen" and shut down my device. It boots fine, but I can't install the mismatched titles. Am I wrong with their versions? Please help!