TesTool shows some conflicts with 2 of my plugins, 'Window Glow 2.2' and one of my own (it only changes some of the lanterns in the Vivec canton plazas).
The conflict is in Data\Flags. For example in the 'Vivec, Telvanni Plaza', Window Glow has a value of 1D and my plugin has a value of 05 (which is the same as morrowind.esm).

If i remove the 2 additional flags in Window Glow with EE, it doesn't seem to have an effect.

So my question is, why does Window Glow change the flags in a lot of cells? Is it necessary? What does these changes do?