2nd Year Depreciation after 1st Year Full Special Depreciation Allowance Taken

TurboTax is calculating a $14,196 depreciation expense to be taken in 2021, but I fully depreciated the >6,000lb SUV in 2020.  I took that Special Depreciation Allowance in 2020 on Form 4562, Part V, line 25 as $37,274 (99.42% business use of a $37,488 purchase basis).  This amount transferred to Schedule C, Part II Expenses, line 13.  All seemed fine.  Fast forward a year, and I'm doing my 2021 taxes, expecting no depreciation to be taken (just a few thousand dollars in fuel, oil, etc. expenses).  I don't understand how/why it is now figuring MORE depreciation expense ($14,196) to be taken in 2021.  The SUV was fully depreciated in 2020. I took that expense in 2020 when there was much more income than the expense (the depreciation expense did not reduce my 2020 business income to anywhere near zero). This makes no sense to AGAIN write off depreciation on a vehicle that was fully depreciated the first year, and I don't know how to fix it.