# Getting Started

## Valid from/until

The menu command System > Release Management > Valid from/until opens a wizard to change the default value for the fields "Valid from" and "Valid until". The wizard changes the default date to the current date or to "01.01.1900 00:00:00" automatically.

Changes are made with the wizard and an SQL script is generated. Execute the script - the path where to find the script is displayed in the message bar.

The settings of the configuration parameter EDB-CRM-NULL are described in the Configuration Parameters documentation!

Configuration Parameters

The setting of the configuration parameter EDB-CRM-NULL should not be changed again once records have been created. The configuration parameter should always have the same setting!
If the configuration parameter has been changed, the records habe to be adapted accordingly, and vice versa.