1. Your previous position has been entrusted with a liquidation order, but there is no transaction and it is in an open position. If you place an order to close the position again, you will be prompted that the position is insufficient.

2. The number of open positions you entrust is greater than your position or your available position (in the case of 1).

3. For example, if you hold an empty order but sell it when closing the position, it will also prompt that the position is insufficient.