Changing phaser form adds extra attributes

Hello Forum,

I have a macro to change the form of a phaser preset but it also adds new attributes to the phaser.

The macro:

Edit Preset 23."Dimmer Group FX 1"
Select Attribute Dimmer
Transition 0
Update /NoConfirm; ClearSelection

Before the macro has run the preset only has dimmer information.

After the macro has run the preset also has color information. (There are sequences playing on the fixtures of the preset)

RGB.R, RGB.G, RGB.B are added.

It does work but I would like to know why this happens? Anybody has an idea?