Is the historical account of Gung Ye's end in Taejo Wang Geon actually true?

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In the drama, Wang Geon staged a coup against Gung Ye, but he tried to embrace Gung Ye—meaning Wang Geon took the throne while trying to protect and keep Gung Ye alive.
Gung Ye supposedly knew Wang Geon was planning the coup but let it happen because he thought Wang Geon was a great person, saying,
"Please become a wise king."
When Gung Ye urged his subordinate, asking if it wasn't time to go, the subordinate killed Gung Ye's aide and then committed suicide himself.
That's how it ended, but did Wang Geon really try to spare and embrace Gung Ye in real life?
If you stage a coup against a king in that era, shouldn't you finish them off? In those days, if you didn't kill them, wouldn't their faction rise up and strike back at Wang Geon, leading to everyone being killed?