[Bug] Octavia Romance Marriage Ending

I have progressed all the way through the Octavia romance (her breaking up with Regongar, her hitting on the barbarian, going cold and asking for space, and then me forgiving her.) However when we talk right before the end game I get the “I’m so very glad having met you choice” as if we are just friends instead of the being together dialogue. This save was played over many years so it is possible there were bugs introduced during that time that were baked into the save.

Are there known bugs with this? Is there a fix, a cheat code or perhaps a way to edit the save to correct the problem?