@aaz if the bundle in Sandbox is installed to a related Production account, you will be able to preserve the copy in Sandbox. Otherwise you can copy it to a Dev account as @NElliott suggested, or install it on the repository if you don't have an extra account. From Help: app/help/helpcenter.nl?fid=section_n3405932.html If the bundle was installed in the related production account before a refresh, NetSuite maintains the bundle definition in the sandbox account after the refresh. NetSuite also maintains the link between the bundle’s source and target accounts. If the bundle was not installed in the related production account before a refresh, the bundle definition is not maintained in the sandbox account after the refresh.