Fix timestamp when None
Fix timestamp when None

CloudVLab/professional-services,CloudVLab/professional-services,CloudVLab/professional-services,GoogleCloudPlatform/professional-services,CloudVLab/professional-services,CloudVLab/professional-services,CloudVLab/professional-services,GoogleCloudPlatform/professional-services,GoogleCloudPlatform/professional-services,GoogleCloudPlatform/professional-services,GoogleCloudPlatform/professional-services,GoogleCloudPlatform/professional-services,GoogleCloudPlatform/professional-services,CloudVLab/professional-services,GoogleCloudPlatform/professional-services,GoogleCloudPlatform/professional-services