It was a new Utah catch and release record for a few days, but was revoked because the angler's license had expired. The fish was still record-sized but it won't be listed in the books. Utah's DWR had this to say:

"It was an honest mistake — and an incredible catch — but the angler’s fishing license had expired a couple of days before he caught the 48-inch lake trout," the Utah Division of Wildlife Resources said in a post on their Facebook. "The previous record of 46.5 inches set by Ray Johnson in 1998 still stands."

Here's the original post.

flaming gorge lake trout record