How do I pass Blueprint game type trough Open Level Node?

Development Programming & Scripting Blueprint
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I’m using OpenLevel node, to load new level, and I’m trying to pass game mode option like that:

?game=/Script/BoxCrusher.ChallengeGameMode -game

But doesn’t work. And I also tried there variants:

?game=/Script/BoxCrusher.ChallengeGameMode_C -game

?game=/Script/BoxCrusher.ChallengeGameMode

?game=/Script/BoxCrusher.ChallengeGameMode_C

?game=BoxCrusher.ChallengeGameMode -game

?game=ChallengeGameMode -game

?game=ChallengeGameMode_C -game

?game=ChallengeGameMode -game

With and without -game, but nothing works. Any ideas ?