Your scanned PDF has duplicate pages (the scanner jammed and re-fed), blank pages (from one-sided originals scanned in duplex mode), and one page that's actually a different document entirely.
Cleanup is one Flint session. Delete PDF pages handles all three.
Survey first
Open delete PDF pages, scroll through the thumbnail grid, identify each page that needs to go. Note the page numbers. For typical scanned messes you'll find: 5-10 blanks, 2-3 duplicates, occasionally an unrelated page. Most pages are fine.
Delete duplicates first
Duplicates are the easiest to spot — two adjacent thumbnails look identical. Click one of each duplicate pair, then delete. Now the duplicates are gone and the page sequence is cleaner.
Delete blanks
Use the 'detect blanks' option if Flint supports it for your file, or click blanks manually. Blanks are obvious in thumbnails — they're white. Click them, delete.
Delete the unrelated page
Sometimes a page from a different document gets scanned in by mistake. Identify it visually (different content, different format), click, delete. Save the cleaned file.
FAQ
Will scanning quality decrease after deleting?
No. Delete removes pages; remaining pages are unchanged.
Can I detect duplicates automatically?
Visual inspection is required — Flint doesn't compare content for similarity.
What about OCR layers on deleted pages?
OCR on deleted pages goes with the page. Remaining pages keep theirs.
How do I avoid this next time?
Configure your scanner: skip-blank-pages, auto-deduplicate (some scanners support it), and feed pages carefully to avoid jams.
Survey, delete, save. Clean up your scan.