In the panel.cfg, found in the P3Dv4\SimObjects\Airplanes\CS_B767-300ER-II_CF6-80C2\panel folder, you can stop this from happening by adding two forward slashes (//) in front of the gauge01=... line, under [Window00]. Like this:

[Window00]
background_color=0,0,0
size_mm=1024,768
window_size_ratio=1.00
visible=1
ident=MAIN_PANEL
render_3d_window=0
window_size=1.000, 1.000
window_pos=0.000, 0.000
gauge00=..\..\CS_B767-300ER-II_PW4060\panel\y767.P01_2D!hk,                      1,   1,   1,   1
//gauge01=update!Main,                         0,   0,   1,   1

Open the panel.cfg with Notepad to make the changes. And... BACKUP THE PANEL.CFG BEFORE MAKING ANY CHANGES TO IT!!!