Cured resin in vat, re-leveled, but corner test still fails

Hello,

I have a Moai at home and was changing resins. I accidentally left my FEP vat filled with Peopoly resin on my countertop with the lights on for a few minutes, but the resin still seemed fluid so I went ahead with the print. Midway through, it started making loud sounds, and I realized the resin had indeed partially cured on the countertop and the build platform was stuck. I removed it, and cleaned everything. I tried new resin, but the print failed. I tried re-leveling, but each time a single peg fails in the same corner. Do you think I need to re-level the vat? Any other solutions are very appreciated.

Thanks

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