[MapProxy] change the grid resolution

[Andrea Peri]

Hi,
Is possible to change the grid resolution adding some low scale level
without lost all the previous caching done ?

More explicitly:
I have a grid with this values:

res: [
# res level scale @96.0 DPI
264.5833333333, # 0 1000000.00000000
66.1458333333, # 1 250000.00000000
18.5208333333, # 2 70000.00000000
6.6410416667, # 3 25100.00000000
6.6145833333, # 4 25000.00000000
5.2916666667, # 5 20000.00000000
2.6458333333, # 6 10000.00000000
1.3229166667, # 7 5000.00000000
0.6614583333, # 8 2500.00000000
0.5291666667, # 9 2000.00000000
0.2645833333, # 10 1000.00000000
0.1322916667, # 11 500.00000000
0.0661458333, # 12 250.00000000
0.0264583333, # 13 100.00000000
]

And need to add some other levels with res 400.0 and so on.
I don't understand if adding this I invalidate the actual cache using this
grid.

Thx.