Upserts a data extension row using Rest Api

Question

when i am trying to insert data into dataextension using rest api thats always show error.how to fix that

Api Doc: https://developer.salesforce.com/docs/atlas.en-us.noversion.mc-apis.meta/mc-apis/putDataExtensionRowByKey.htm

Put Url : https://www.exacttargetapis.com/hub/v1/dataeventsasync/key:4D58A264-3B49-44C4-A350-14D2D0A7D39B/rows/CustomerID:123

Post Data : { "values":{ "Interest":"1et.com" } }

In Header i provide AccessToken Also

Response will be: { "message": "Primary key 'CustomerID' does not exist.", "errorcode": 10000, "documentation": "" }

But i have CustomerID as a Primary Key on that Data Extension

Total Records In DE: