Fix bug where ADD failed if inside transaction and key did not previously exist.
Fix bug where ADD failed if inside transaction and key did not previously exist.

scalien/scaliendb,timoc/scaliendb,scalien/scaliendb,timoc/scaliendb,timoc/scaliendb,scalien/scaliendb,timoc/scaliendb,scalien/scaliendb,scalien/scaliendb,scalien/scaliendb,scalien/scaliendb,timoc/scaliendb,scalien/scaliendb,timoc/scaliendb,timoc/scaliendb,timoc/scaliendb,timoc/scaliendb