How to edit Supplier on a non-catalog item requisition?

Summary:

When entering a non catalog item, after adding it to cart and saving we can no longer edit the supplier field. How can we make this field editable when editing the purchase requisition?

Content (please ensure you mask any confidential information):

When entering a non catalog item, after adding it to cart and saving we can no longer edit the supplier field. How can we make this field editable when editing the purchase requisition?

Version (include the version you are using, if applicable):

24B

Code Snippet (add any code snippets that support your topic, if applicable):