 In this paper, we carry out the first systematic investigation of overfitting in BO and demonstrate that this is a serious yet often overlooked concern in practice.
<clarity>  In this paper, we carry out the first systematic investigation of overfitting in BO and demonstrate that this is a serious yet often overlooked concern in practice.
 In this paper, we carry out the first systematic investigation of overfitting in BO and demonstrate that this is a serious yet often overlooked in practice.