Fix bug #2224

[dusx1981]

Description

解决多次创建同一个数据库，存储元数据的向量库不被创建的问题

How Has This Been Tested?

多次添加删除同一个数据库

Checklist:

• My code follows the style guidelines of this project
• I have already rebased the commits and make the commit message conform to the project standard.
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• Any dependent changes have been merged and published in downstream modules