Can young adults marry? Can they marry an adult sim?

So I had two sims, one young adult and one adult. I did the wedding ceremonies and eloping and the married status didn't appear. I made the young adult become adult and made them eloping and it worked. 

So why is it that? 

Bug?

Young adults can't marry? 

Sims of different ages can't marry? 

Thanks 😊✨️✨️✨️

@Giapa95 

Yes they have always had the possibility to marry adults and elders. Teens and below can not marry.

@Giapa95 Yes, a young adult and adult should be able to elope/marry each other. So you go through the elopement or the wedding ceremony, and the ceremony completes, but they do not show as married? Can you share a screenshot of their relationship info? Do you have Mods or CC? If you do, please try testing as follows:

Hi I don't have mods or ccs in the game. Now my sims show up as married because I made the young adult sim become adult so they are both adults. The problem is that before, after the marriage ceremony and eloping, they didn't show up as married. Maybe a bug? 

@Giapa95 

No, not a bug. In testing it does work as intended. It is hard to say what your problem was when I don't have the save with the issue.

@jpkarlsen 

Okay I try to explain about it again.

I have My wedding stories dlc and other dlcs as well but no mods and no CCs. 

The sims I wanted to marry were a young adult and an adult and they were already engaged though they became engaged while I was playing another sim and household basically. 

I wanted to make them marry so I did hold a marriage ceremony with the exchange of the vows but unfortunately at the end of it they did show up as "twin flames" still like before and nowhere it said they were married and there was even no married moodlet. 

So I tried to make them eloping since I didn't want to make another wedding ceremony. Eloping didn't work as well. 

Then I didn't know what to do and decided to make the young adult sim grow up to an adult sim. 

I then made them elope and it DID work!!! They showed up as married in the sim profile and also they had the married moodlet. 

This is why I was asking if it was a bug...or maybe young adults can't marry? 

@Giapa95 

I don't really know what you mean with "twin flames". If they already lived together there would be no moving in together dialog they would just be married. As I wrote I would need to have the save to see what could have happened as something must have as they were later able to elope.

@GiardiniDiMarzo that's exactly what I meant...

@GiardiniDiMarzo 

Thanks. It will unfortunately be close to impossible to replicate if a YA and an adult that are engaged by neighborhood stories cant be married as there is no way to force such a situation but there might be a bug with that. No way to say for sure though.