Unable to Patch for Trade Operation PO Schedule using REST API

Summary:

Unable to Patch for Trade Operation PO Schedule

Content (required):

Customer is getting Error: "404 not found" while updating Landed Cost PO Schedule using REST API

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

21D

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

PATCH:

Body:

{

"AllocationRate": 2.05,

}

Error: 404 not found