yep

Shogi.Database/Session/Stored Procedures/CreateSession.sql

@@ -1,14 +1,14 @@
 CREATE PROCEDURE [session].[CreateSession]
-	@InitialBoardStateDocument [session].[JsonDocument]
+	@InitialBoardStateDocument [session].[JsonDocument],
+	@Player1Name [user].[UserName]
 AS
 BEGIN
 	SET NOCOUNT ON
 
-	INSERT INTO [session].[Session] ([Name], BoardState, Player1Id)
+	INSERT INTO [session].[Session] (BoardState, Player1Id)
 	SELECT
-		JSON_VALUE(@InitialBoardStateDocument, '$.Name'),
 		@InitialBoardStateDocument,
 		Id
 	FROM [user].[User]
-	WHERE [Name] = JSON_VALUE(@InitialBoardStateDocument, '$.Player1');
+	WHERE [Name] = @Player1Name
 END

Shogi.Database/Session/Stored Procedures/ReadSession.sql

@@ -6,7 +6,6 @@ BEGIN
 
 	SELECT
 		sess.[Name],
-		GameOver,
 		BoardState,
 		p1.[Name] as Player1,
 		p2.[Name] as Player2