Request ID: 00-b74b70bf071e86c062ad0f434fdda164-7b8a4c24ec60a912-00
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.