• I have searched the issues of this repository and believe that this is not a duplicate.
• I have checked the FAQ of this repository and believe that this is not a duplicate.

environment

• canal.admin-1.1.6
• canal.deployer-1.1.6
• mysql-5.7.41-linux-glibc2.12-x86_64

Issue Description

Instance 管理，在不同'集群'内，各创建一个同名的Instance，会提示 Error[Duplicate entry 'Instancename' for key 'name_UNIQUE']

Steps to reproduce

Expected behaviour

SUCCESS

Actual behaviour

Error[Duplicate entry 'Instancename' for key 'name_UNIQUE']

If there is an exception, please attach the exception trace:

<img width="765" alt="bugsql" src="https://github.com/alibaba/canal/assets/45681331/594c98ed-7d5b-4aec-813a-0464f75fa17b">