ORA-23432: master site string already exists
Cause: An attempt was made to instantiate a replicated object group at a master site that was already a part of the object group.
Action: If you were trying to add this site, do nothing because it already exists; otherwise, pick the name of another site, and re-run the routine.
ORA-23432错误提示，“主站字符串已存在”。
1.检查Oracle技术环境中的另一个节点是否已经存在该主机字符串，如果在技术环境中发现该字符串，那么用户必须删除字符串来解决此错误消息。
2.然后尝试使用Oracle安装器或Database Configuration Assistant (DBCA)重新启动实例，以添加新的主机字符串。