I understand where you’re coming from on not repeating suggestions, however if this wasn’t a rule there’d be a lot of repeats like in-game reporting or duels or a new rank. Even if it’s older, you are still able to add-on or vote on a suggestion, so duplicates wouldn’t be necessary.
For necro-posting, I will present you with this,
All of the rules are pretty updated, and there’s clarifications on what rules apply to where in many places. If you are ever confused you are welcome to refer back to the rules page or even message a staff member 