I am live trading with Schwab Charles. I had an open short position and got invalid order as below. My code is using self.liquidate(). Anyone know why it fails?

-2026-06-15 15:59:00  FISV Buy Market 
Fill: $0.00 USD

82 Invalid Liquidated
2026-06-15 15:59:02
FISV -  0 Submitted Order place submitted
2026-06-15 11:59:02
FISV -  0 Invalid { Name = PRICES_CAN_CHANGE_QUICKLY, Description = With market orders, prices can change quickly in fast market conditions resulting in execution prices that can be different from the quotes displayed at order entry. },{ Name = Position_Sys_0001, Description = This order may result in an oversold/overbought position in your account. Please check your position quantity and/or open orders. }