cannot edit pre-existing sims

I believe I've seen this before where when you saved those sims, the save also registered that they already had parents who are no longer existing but at the same time they did at one point and so you can't fill their spots with someone else bc they did technically exist to create the children in the first place.

I remember that one time I created this household where there was this lone grandmother who takes care of her only grandson and their pet cat. I remembered that I couldn't register the grandmother as the teen's grandmother without having made a parent to then have the child that would be the teen grandson. I did this all in CAS; create the grandmother, then create her daughter, then create the grandson from the daughter, then deleted the mother to register that she doesn't exist within the game. I let them play in live mode and that's that.

Sometime later I wanted to have this YA townie from one of my saves become the mother of the grandson, and tried to add her into CAS into their family. I was able to make her the daughter of the grandma, but could only keep her as an aunt of the grandson and couldn't force the game to register her as the teen's own mother bc technically she never was to begin with.

I did just test a workaround that if you saved both of them separated in your library, then go into a brand new CAS and re-add them both into one household, you can then make them their parents again. If that still doesn't work for you, I know there is a mod that can force the game to register them as their parents.

Thanks for the insight @paradiseplanet

Thing is, the parents I've added to the family are their actual parents in the old save. They were saved separately to the library because they no longer live with the parents. It worked for all families except for one. It's so upsetting because he and his family were one of my absolute favorites and now he can't be related to them in the new save. What gives?

Do you have the link to that mod, because it seems as though it's my only option.

Hello
I am sorry that you are having this issue.
MC Command Center mod can help to set relationships.
It can be downloaded at
https://deaderpoolmc.tumblr.com

There is information about the mod in this link
https://deaderpoolmc.tumblr.com/doc/overview
There is further information about the modules by clicking on the yellow titles on the site page.
This link thread provides help for the MC Command Center Mod. If you decide to use it and you have questions about the settings, you can post about it there, and there are helpful simmers there that will help you.
http://forums.thesims.com/en_US/discussion/913483/mc-command-center-local-help-chat-thread

Thanks @rosemow I have mccc but can it actually make sims related or are you referring to the friend and romantic relationships cheat? I haven’t found where mccc can force a sim to be a parent or child of another, which is my issue.

I had this same problem when I wanted to make grandparents for my kids. You can do it in MCCC, but I don't have that and it messed with too many other things in my game to keep. I found a post on the forums by Nastiia, I'll copy it into this one. It's time consuming and you have to do it with EACH sim, but it worked for me.

"Nastiia;c-15387367" wrote:
Ok this is an old post, and I still have not find a solution to this by someone else (I know the solution) which amazes me, and the CAS full edit mode DOES NOT work on this. (rarely it does with some relationships) I will post this guide to edit family relationships to an already created family, just in case someone would search it in the future:

1. Open the cheat console ctrl + shift + c and type: "testingcheats true"
2. Now type: "sims.get_sim_id_by_name yoursimfirstname yoursimlastname" (The desired sim must be selected)
-It will pop up a large number. This is very important. This number is your Sim ID
3. Type again the same thing in step 2 but now with your desired target sim name.
-I mean, if you want to change your (example) son and mom relationship, you need to type the text from step 2 from both of them
You should now have 2 large numbers in the console. (SimID)

---MAKE SURE TESTINGCHEATS IS ENABLED, AGAIN! OTHERWISE THE NEXT STEPS WON'T WORK---
-In step 4 you will write your desired relationshipBit. (Obviously I mean, don't write the word "relationshipbit") you need to overwrite the word with These relationshipBits:
*family_husband_wife
*family_son_daughter
*family_parent
*family_grandparent
*family_grandchild
4. In the console, type: "relationship.add_bit yoursimID targetsimID relationshipbit"
-YoursimID is the large number you got from your selected sims. You need to write the whole numbers.
-relationshipbit DOESN'T NEED TO BE WRITTEN, it needs to be one of the 5 commands I wrote in step 4.

If it doesn't work, it's because for some reason, Testingcheats disabled automatically (It happenned to me several times) Write it again and make sure its enabled again, and repeat the step 4.
Hope this helps."

"taydev;c-16276624" wrote:
Thanks @rosemow I have mccc but can it actually make sims related or are you referring to the friend and romantic relationships cheat? I haven’t found where mccc can force a sim to be a parent or child of another, which is my issue.

Hello
You can change the relationships in MCCC to make sims related, not just to alter the friendship and romance bar.
If you post on the help thread that I posted the link to, simmers there will give further directions where the settings are in MCCC mod.

Wow that is time consuming. Anyone know of a quicker way with mccc? I can’t find it. Thanks @Jenna2376 I’ll save the instructions and use them in case it can’t be done easier via mccc.

Right? I think it took me like 10 minutes to make my adult sims related to the elder sims I plopped into the game. I just wanted my babies to have grandparents! haha. I tied to do it with MCCC, for some reason I just couldn't.

It looks like you can use the console commands in MCCC. Rel_set looks like it does the trick. Here's the website that shows you how to do it:

https://deaderpoolmc.tumblr.com/doc/mccommandcenter

"Jenna2376;c-16276733" wrote:
I just wanted my babies to have grandparents! haha.

Seriously, it shouldn't be such a hassle! lol. And I'd probably dismiss it if my main sim didn't have parents, but he does and I just want an older version of all of them in another save. And as I said before, I did it easily with the other households, so it's weird that the game decided not to for one sim :/

Thanks so much for everyone's help. I'll give it a try now.

@Jenna2376 really adorable sim in your picture, by the way :)