Request ID: 00-b5976d2f7829fc5fd307bc53ab40d135-6230e01c7b9244b5-00
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.