Fix the photo on the same DS-160. Don’t start a new one first.

Save the application ID. Edit before submit is cheap.

CEAC lets you retrieve an application you have not submitted. Use that. Replace the photo. Keep every other answer. A new DS-160 because the first JPEG bounced is how people lose a half-filled form and then upload the same bad file again.

After you submit, the confirmation barcode is what the post expects. A new DS-160 means a new confirmation. Only do that when the stored photo is actually wrong — not because the confirmation preview looks soft.

An X is not automatically “start over”

If the confirmation shows an X instead of a face, you can still go to the interview with a 2×2 print and that confirmation. Starting a new form is optional, and only useful if you still have time to submit a replacement and bring the new barcode. Do not miss an appointment because you opened a second application the night before.

Replace with a file that will survive the next upload

Measure first. Square JPEG, 600–1200 px, 240 kB or less, sRGB, head 50–69%. Then retrieve, replace, resubmit if needed. If you already submitted and the stored file is fine, leave the application ID alone.

Questions

I lost the application ID. Do I have to start over?

If you cannot retrieve the form, you may have no choice. Write the ID down before you close the tab next time. A bad photo alone is not why people lose the ID.

I already paid the visa fee on the old confirmation.

Fee and appointment rules are post-specific. A new DS-160 can mean a new confirmation at the window. Ask that embassy before you burn the old barcode over a photo.

The preview is blurry. Should I retrieve and replace?

Not for preview blur alone. Soft pixels with a face in the box usually mean the upload already worked.