What the prologue said:
"The second ascension was truly grand and spectacular.
What was even more spectacular was that, after he ascended, he charged all the way into the Heavenly Realm and rampaged in full fury. Thus, he had only been ascended for the span of one incense time before he was knocked back down again."
What actually happened:
Bravely Xie Lian overcame his inner hatred towards people of Yongan. He wanted to take back the human disease curse on himself. But Wuming got it himself and dissipated because of the curse on behalf of His Highness. Xie Lian ascended. But he asked and earnestly requested for banishment. And thus, he got banished.
He deeply regretted. And wanted a reminder to live with the guilt of killing his ghost general and almost ruining lives of people, that he got not one but two cursed shackles and sealed his spiritual power.
History was twisted beyond belief and poor Xie Lian was mocked as laughingstock of 3 realms. Nobody knew the truth but everybody gossiped. My poor baby LianLian..