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When an Oracle Application Express administrator creates a new workspace, Oracle Application Express automatically creates a demonstration application within the workspace.
To disable the creation of demonstration applications:
Log in to Oracle Application Express Administration Services. See "Logging in to Oracle Application Express Administration Services".
Click Manage Service.
Under Manage Environment Settings, click Feature Configuration.
Locate the Application Development section.
For Create demonstration objects in new workspaces, select No.
Click Apply Changes.