Normally when you're changing relationships and detaching people, the done thing is to leave a research note with evidence of why they're not the correct profile, otherwise they're just left hanging with no information on them, and people may reattach them again (and also it's polite to inform the PM of what and why, even if they're not active). So it's good to cover all bases there.
Before making too many changes, it's best to do the research first and find sources so that you're more sure. Make research notes first, detach later. Hope that helps!