Is this seborrheic keratosis or melanoma? (Photo)

I had a really bad sunburn that caused my skin to peel about 5 months ago. I've noticed new freckles on my chest and shoulders. A week ago I noticed an entirely new growth. I've done research and thinks it's seborrheic keratosis but I'm not sure. It doesn't itch or hurt. It is raised and has some brownish black in the center.

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