2 craft omens active sinistral necromancy + abyssal echoes

can this 2 omens be active at the same time? the wikis says this

"It is possible to have multiple related omens active at a time (e.g., an Omen of Sinistral Annulment and an Omen of Greater Annulment can be used together to remove two prefix modifiers). However, activating an omen while another, non-related omen is active may deactivate the old one. "



edit: well tried cant this wiki description make confuse