MAXIMA combination rule

Hello,
The following code generate the warning “Load Case 100 is defined more than once in the same Action or in different Actions”.The load case 100 has item TYPE set to NONE.

+PROG MAXIMA 

COMB NO 5 EXTR STAN
LC NO 100      TYPE AG1 FACT 1.1
LC NO 100      TYPE AG1 FACT 0.9

My intention is to generate the code for the exclusive inclusion of a permanent load with either 1.1 or 0.9 coefficient. Any ideas are very welcome!

Its ok, another way is to do:
LC 100 type g fact 1.0
LC 100 type Q fact 0.1
LC 100 type Q fact -0.1
but warning will also appear, I would not bother