Create new stuff or rename old to new stuff

Hi, found out Relation: ‪S2‬ (‪10839602‬) | OpenStreetMap
There is no more S2 as per this map but there is S3.
Should 10839602 be renamed from S2 to S3 or S2 be deprecated and requesting a new S3 relationship ?

Hmmm. S2 is still on the time table
And S2 is still on the map (in red)

S2 now stands for Grandson–Lausanne, I was referring to the S3 Vallorbe–Aigle

Yes, I’d suggest to rename relations S2 → S3 and create a new relation for (new) S2.