Error to efile with problem on schedule m1

am getting below error for filing my S-Corp Business Tax Return:

Error: Schedule M-1 Items Worksheet: Book-TxExmpt In-OutState If you want to use the Scheduled M-1 worksheet, please delete entries made on Schedule K, Line 16b and/or the Smart Worksheet above it and re-enter tax-exempt income items on the Schedule M-1 worksheet instead.

I don't have anything to enter for Book-TxExmpt In-OutState, and it should not be giving me this error. I tried to manually overwrite Schedule K, Line 16b (which was auto filled by TurboTax), yet I am getting the same error. So, I put the value back in Schedule K, Line 16b.

Please help.

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