Aspiration Soulmate doesn't work

Product: The Sims 4
Platform:PC
Which language are you playing the game in? English
How often does the bug occur? Every time (100%)
What is your current game version number? 1.61.15.1020
What expansions, game packs, and stuff packs do you have installed? None
Steps: How can we find the bug ourselves? Aspiration - Soulmate
What happens when the bug occurs? I married my Sim to his boyfriend and the quest is still open.
What do you expect to see? The task "Be married to BFF" should be completed
Have you installed any customization with the game, e.g. Custom Content or Mods? Never used.
Did this issue appear after a specific patch or change you made to your system? No

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I'm doing the soulmate aspiration and they are married now, but the quest still isn't completed: the missing task is still to get married, but I can't propose again.

Is there anything I did wrong or any cheat or activity I still have to do?