Editing one sim's liked activities results in engaged sims becoming siblings. Using mods to remove this flag doesn't fix the issue.
Ideas
Status changed:
New
to Duplicate
Please use this thread: Partnered Sims turn into siblings | EA Forums - 4943482
For the future please consult the [READ FIRST] Compiled list of reported Issues | EA Forums - 5052943 and/or use search to see if your issue already has a report before making a new one.
Thank you.