Exception when updating row with rowversion?

I have a table that looks like this :

CREATE TABLE [dbo].[akut_prioritering]
(
    [behandling_id] [int] NOT NULL,
    [akutstatus] [int] NOT NULL,
    [nasta_dag] [bit] NOT NULL,
    [sort_order] [bigint] NOT NULL,
    [rowversion] [timestamp] NOT NULL,

    CONSTRAINT [XPKakut_prioritering] 
        PRIMARY KEY CLUSTERED ([behandling_id] ASC)
) ON [PRIMARY]

And then I have this stored procedure that tries to update rows in this table :

ALTER PROCEDURE [dbo].[akutlistaSave] 
    @behandlingSortOrder dbo.akutlista_sortorder_tabletype READONLY
AS
BEGIN
    SET NOCOUNT ON;

    DECLARE @behandlingId INT;
    DECLARE @sortOrder BIGINT;
    DECLARE @rowversion ROWVERSION;

    DECLARE sortOrderCursor CURSOR LOCAL SCROLL STATIC FOR
        SELECT behandling_id, sort_order FROM @behandlingSortOrder

    OPEN sortOrderCursor

    BEGIN TRAN

        FETCH NEXT FROM sortOrderCursor INTO @behandlingId, @sortOrder, @rowversion

        WHILE @@FETCH_STATUS = 0
        BEGIN
            IF EXISTS(SELECT * 
                      FROM akut_prioritering ap 
                      WHERE ap.behandling_id = @behandlingId 
                        AND ap.rowversion = @rowversion)
            BEGIN
                UPDATE akut_prioritering
                SET sort_order = @sortOrder
                WHERE behandling_id = @behandlingId;
            END
            ELSE
            BEGIN
                RAISERROR ('Rowversion not correct.', 16, 1);
            END

            FETCH NEXT FROM sortOrderCursor INTO @behandlingId, @sortOrder, @rowversion
        END

        CLOSE sortOrderCursor

        SELECT 
            ap.behandling_id, ap.rowversion 
        FROM 
            akut_prioritering ap 
        INNER JOIN 
            @behandlingSortOrder bso ON ap.behandling_id = bso.behandling_id;

        DEALLOCATE sortOrderCursor
END

The inparameter type looks like this :

CREATE TYPE [dbo].[akutlista_sortorder_tabletype] AS TABLE 
            (
                [behandling_id] [int] NULL,
                [sort_order] [bigint] NULL,
                [rowversion] [timestamp] NULL
            )

When running this I get a SqlException :

Cannot insert an explicit value into a timestamp column. Use INSERT with a column list to exclude the timestamp column, or insert a DEFAULT into the timestamp column.

From what I understand the rowversion column should be updated with a new value automatically, there is no reason in my case to set it manual.

Solution

You can't set the rowversion value in dbo.akutlista_sortorder_tabletype because it is not updateable: it is auto generated

However, rowversion (a.k.a deprecated timestamp) is simply a (var)binary(8) with some special rules. You can define and set a (var)binary(8) in dbo.akutlista_sortorder_tabletype and compare on that in the UPDATE

From the first link

A nonnullable rowversion column is semantically equivalent to a binary(8) column. A nullable rowversion column is semantically equivalent to a varbinary(8) column.