Thanks for the link. Since you are the profile manager for Samuel, it should be no problem. Edit his profile. His relatives are listed on the right side of the screen. Just below Olive's name, click 'replace/remove mother,' and take it from there. Please be aware that this also changes Olive's profile, which her PM might not agree with. I suggest you touch base with him first.
I'm curious about the Suggestion/Error, though. How would the errorbot know he had the wrong mother?