Something went wrong
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.
Reference: 00-bda0b1c7d69469080e3723064a5d5795-35c8e40c5e77bdff-00