To Back Up Placement References
Use the Backup References options to update the placement of components during the next regeneration, regardless of whether the parent is present or not.
1. To set the option directly, right-click and choose References > Backup References from the shortcut menu. Alternatively, right-click and choose from the shortcut menu, then select the Backup References check box on the Properties tab of the Component Placement tab.
2. To backup references for all components in the assembly, click Model > Operations > References > Back Up All References.
3. To remove reference backup, click Model > Operations > References > Remove All Backups.