Unable to update Project Expenditure Item DFF using REST API- why?

Summary:

Hi,

We are trying to update the Project Expenditure Item DFF using rest API /fscmRestApi/resources/11.13.18.05/projectCosts/{projectCostsUniqID}/child/ProjectCostsDFF/{ExpenditureItemId}

We are getting the following error in return:

Applying List binding LOV_freeText with given set of values leads to no matching row for a row of type :ProjectCostsVO_ProjectCostsDFF_ProjectCostsToProjectCostsDFFVO_PjcEiVO, key oracle.jbo.Key[

    29000

]

The DFF that has been configured is deployed successfully and the value set is enabled for 150 charachters:

Can someone tell where we are going wrong?

Content (required):

The Get Rest API for the DFF returned this value:

{

"items": [

{

"ExpenditureItemId": 27000,

"freeText": null,

"__FLEX_Context": null,