Sedgwick County (county code: SG) is a county located in the U.S. state of Kansas. As of the 2010 census, the population was 498,365, making it the second-most populous county in Kansas. The county seat is Wichita, the most populous city in the state.
Wichita is the county seat of Kansas
Kansas is a state and does not have county seats. I think the system got it wrong because the statement is almost correct but has some keywords swapped