文档解释
ORA-23665: DML conflict handler “string” not found
Cause: The DML conflict handler was not found for modification or removal.
Action: Make sure the name of the conflict handler is correct and that it exists.
ORA-23665：是由于尝试使用未知的DML冲突处理程序导致的错误。
官方解释
Cause: An unknown DML conflict handler was specified.
Action: Specify a valid DML conflict handler.
