Request ID: 00-4c9b8b76a67be8b4474d61c6c455522c-9a4d3d13ba02e00b-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.