Can we update accounting_class_code in table csi_item_instances

Hi All,

We are creating a trigger to update few fields in table csi_item_instances.

We are unable to update accounting_class_code.

Can anyone please let me know how can we update accounting_class_code in table csi_item_instances using this trigger.

Trigger is also attached in this post.

Thanks in Advance,

Manu