For the next few feedings, feed a small meal, one only. And wait some time before you do feed the next meal.
Anything change? Substrate? Location? Rodent supply? Anything? Have you had the snake long?
I had a male Cal king who would regurge once or twice in Summer every year. He lived 19-20 yrs so I know he was in OK shape. I figured it was the temperature being what it was without much of a cool side. Kings do appreciate a cooler area well below 80.
Anyway, keep a key eye on things. Watch substrates too. Sometimes one snake might be sensitive where others are fine. Sometimes going to newspaper is a good thing when you sense a problem.
When I kept kings/milks in the house, they would invariably not eat as much in Summer, especially males. Now that they have been in a shed where they are more subjected to daytime highs and nightime lows, they are eating like gangbusters during Summer. Interesting.
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Mark