Definitely creased, get it fixed. I snapped a board clean in half early this year after a big wipeout without inspecting the board after. I reckon if I had checked it, I would've noticed cracks like yours is. I went for a small (<1ft) wave the week after the wipeout, stepped forward & snap...swim).
I called a repairer (Stonker in Torquay, Vic) & Alex said it would be about $300 to repair with carbon/vac and although it would add a bit of weight, it won't snap there again...also gave me the option of a trade for a custom as he could on-sell it as a 'cheap' repaired board to a lighter beginner looking for a bargain no probs. I took the offer & glad I did (from w/surf board repair experience, it takes a while to get confident again on a board that you know has been damaged).
For a bit of additional coin, I got a new/tougher custom that I have full trust in that's been made to suit my (ahem) 'power & girth'

& someone (presumably lighter) gets a quality but cheap/well-repaired board to begin their SUP experience.
See if you can get the option of trade otherwise unless you know about board construction & can put full trust in the repairer, you'll always be looking for those cracks & won't be able to push yourself.
...my 2 cents.