Selling an exemption

[kitt53]

I filed for bankruptcy on March 3rd, on March 15th my truck that is paid off and is listed as an exemption broke down. So, I sold it off and bought another truck for the same price that I got for the broke down truck. I didn't realize that I couldn't do this since I have yet to have my 341 meeting. What could happen in this situation? The price I paid for the new truck is $1250, and I live in Nebraska.