Articles on detaching relationships should add advice to remove wrong sources at same time
Even with my years of experience of removing spouses / children from family relationships I often come close to forgetting to remove the inapplicable source(s) on which the "Add child" or "Add spouse" action was probably originally based.
I just checked the existing articles on detaching a child / spouse from a relationship and there is no mention of removing the inapplicable sources at the same time. Obviously, these should be detached from individuals to whom they do not apply, regardless of whether the correct individual(s) to whom they actually do apply can be identified at the time.
A shame there can't be some sort of pop-up, during the detachment process, to ask, "Have you removed any wrongly attached sources, too?"