Schedule 3 Warning - Property Flipping

I am using Turbotax Desktop program for taxes.  When I go to netfile it says I have a Schedule 3 warning regarding Property flipping and needing more info about the property I sold.  I did not sell any property?  I didn't check off that I had sold any property?  It shows up on both of the tax returns I am trying to send.

 

I just ignored the warning and filed.  Was this incorrect?

 

Thanks!