IRS Rejected return due to negative inventory?

I have completed my 2020 return but am getting the error that the IRS has rejected due to negative Inventory on my Schedule C.  I have inventory and it was the same as last year and both are positive numbers.  I have changed the ending balance slightly to see if it was a turbo tax thing.  I printed the return and went over every number and there is not place that I see negative inventory.   

 

Any help would be appreciated