Aimfox HTTP API Error: The Target is Locked on First 11 Rows with 400 Bad Request

I am getting the following error while using an Aimfox HTTP API: Clay received a 400 error from the API with Content: {"status":"fail","error":{"code":400,"message":"The Target is Locked","type":"Bad Request","data":"locked"}} The first 11 rows are giving the error message but the rest of the rows are running just fine.