One reason is that the Europeans are buying more gas for reselling it to Ukraine and the other reason is that they are buying more gas because they no longer trust Ukraine as a transit country. This is one more ground for Gazprom to insist on the need for bypassing routes like TurkStream and Nord Stream 2. If they are built, the Stockholm court's decisions will no longer matter as the contract will expire and Naftogaz will have no more instruments for blackmailing Gazprom.