Those were not a separate purge but rather a continuation of the previous ones. Not only were these purges smaller then all the previous ones, continuing the trend of the purges tapering off, but I have never seen any evidence they actually impacted the progress of the reform and rearmament programs nor the Red Army's fighting capability... probably because there wasn't any further down for the Red Army's fighting capability to go. The Soviets were already at rock bottom in '41, there was nowhere for them to go but up.