you dont have an xbl/psn account linked to it, or have facebook linked.
Seriously, bungie, you could literally be making some ancient members disappear due to this.
How fucking shitty is that?
Linky to info
https://www.bungie.net/en/User/Sunset?id=Wlid&sourcekey=orphan
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Not too hard to make a silver account for the sake of keeping their names if they really wanted to.