Unable to delete the assignment of HU to Order

Dear Experts,

We are encountering an contented portion pursuing the process of canceling the Goods Issue (GI) of accumulation orders utilizing the HUCANC transaction and deleting the duty to the accumulation bid utilizing the COPAWA transaction. The process, which antecedently worked, is present failing, with the strategy returning the message: "No materials person been picked" (SAP connection VHUMI 131).

I person attached screenshots of the mistake message, the Handling Unit (HU), and the accumulation bid for your reference. Could you delight counsel connected however to resoluteness this issue? We are operating successful an ECC environment.

Thank you for your assistance.