Request ID: 00-b4b728ce7a86e05ce7e66b26bbd7d757-a3b727c8bd138789-00
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.