# Delete an update set

Deleting an Update Set is strongly not recommended. Administrators can delete an Update Set only when it is not the current Update Set and it is empty (no `sys_update_xml` entries are associated with it).

For example, after merging Update Sets you may choose to delete the original sets. This function is restricted by an access control rule (ACL) on the Update Set [`sys_update_set`] table.
Warning: Deleting Update Sets that contain `sys_update_xml` entries is restricted and strongly not recommended because:
• Deleting the Update Set removes the `sys_update_xml` entries associated with the Update Set, so customizations are overwritten when the instance is upgraded.