Request ID: 00-3af21450180a74e08764e5ad831fcf03-12f256e6ab77cfc3-00
A second operation was started on this context instance before a previous operation completed. This is usually caused by different threads concurrently using the same instance of DbContext. For more information on how to avoid threading issues with DbContext, see https://go.microsoft.com/fwlink/?linkid=2097913.