AGI vs MAGI

I deleted my W2 income from my 2024 tax return to estimate my MAGI in retirement (I also have some (qualified) dividend, interest, cap gain & schedule E income). Now my MAGI is smaller than AGI (yes, MAGI << AGI). How is this remotely possible? What did I do wrong? What should I check (assuming there is no bug in TurboTax)?