[Débutant] Parameter '@logo' has already benn defined

Bonjour,

Mon bouton click pose probleme.
Une fois fais le premier click il sauvegarde correctement mais au second j'ai cette erreur:

Code:

Parameter '@logo' has already benn defined

Voici mon code. Merci de vos commentaires ou modifications suggérer.

Code:

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    Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
 
        'Verificar DNI Duplicado'
        MysqlConn.Open()
        COMMAND.CommandText = "select * from scale where name = '" & TextBox3.Text & "'"
        READER = COMMAND.ExecuteReader
        If READER.HasRows Then
            MsgBox("Scale Duplicated !", MsgBoxStyle.Critical)
            Me.Show()
            MysqlConn.Close()
        Else
            MysqlConn.Close()
            MysqlConn.Open()
            MysqlConn.Dispose()
            'Verificar DNI Duplicado'
            Me.Cursor = Cursors.WaitCursor
            'Guardar Imagen
            Dim mstream As New System.IO.MemoryStream()
            PictureBox1.Image.Save(mstream, System.Drawing.Imaging.ImageFormat.Png)
            Dim arrImage() As Byte = mstream.GetBuffer()
            mstream.Close()
            'Guardar Imagen'
            Try
                MysqlConn.Open()
                COMMAND.Connection = MysqlConn
                COMMAND.CommandType = CommandType.Text
                COMMAND.CommandText = "insert into scale (name, logo) values ('" & TextBox3.Text & "', @logo)"
                COMMAND.Parameters.AddWithValue("@logo", arrImage)
                READER = COMMAND.ExecuteReader
                MessageBox.Show("Datos Guardados")
                MysqlConn.Close()
            Catch ex As Exception
                MessageBox.Show(ex.Message)
            Finally
                MysqlConn.Dispose()
            End Try
        End If
        MysqlConn.Close()
        Me.Cursor = Cursors.Default
    End Sub