I can change from @active = 1 to @active = 0 but I can't change de @Cd attribute.
After de DOP Import, and using Fetch Unpacked Geometry, I can put a Point Wrangle and change it, but I want to know whether there is some method to change attributes in the DOP Network.

Frame 1
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Frame 30
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instead of fetching unpacked, fetch packed and append Unpack SOP with Transfer Attribs set to Cd
or keep it packed and access Cd from packed primitive through Renderstate VOP as packed:Cd

there seems to be a limitation currently that if you are using Packed Fragments, if you want to see the color in the viewport, packed level Cd will have to be on Primitives otherwise it will not show up, however it will still work if you inspect spreadsheet
I also suggest not having Cd on the geometry inside packed geo beforehad

Thanks for the answer and tips, Tomas.