The presence of *C means plainly that you had there an interface that has been either deleted or renamed, the RoS cannot find It anymore and uses a reference formed by asterisk and a hex number.
That is point #21 in GP&CSA:
If you prefer, it is a symptom of something else that happened before.
Since it was categorized as WAN, probably (It depends on devices of course) the referred interface Is ether1 (possibly renamed to something else).