Request ID: 00-c6b399f528da88aa50c20a0e4800a205-bf87700f1b017f60-00
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.