Failed to start DDE: Application startup exception: System.NotSupportedException: SQLite does not support this migration operation ('DropColumnOperation')

This error occurs with old versions of the Data Distribution Engine.

Make sure to change the internal VirtDB database from the default SQLite to either a MS SQL Server, PostgreSQL or MySQL. These setting can be maintained in the appsettings.json of the DDE.

Restart the DDE after changing the parameters.