Self employed not letting me have a - CAA amount after selling a vehicle.

I am trying to fill in the self employed section. I use to do food delivery but during the year I stopped, and I sold the vehicle so I put the end of my "business" as the day I sold it and now i am trying to put the amount in that I got for it but it keeps saying this 

1Your CCA claim cannot be greater than $-623.38. The CCA deduction for your asset is limited to 30.00% of your base amount plus immediate expense amount.

 

can you guys please fix this so I can put my actual amount in? I am not gonna make up a number to get it to $0 for CCA. The CRA audits me and I would be screwed for lying just to get the numbers to work on the software on here.