Caused by: org.postgresql.util.PSQLException: ERROR: type "vector" already exists reason: bad SQL grammar [CREATE EXTENSION IF NOT EXISTS vector]

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Bug description
A clear and concise description of what the bug is about.
/build/classes/kotlin/main/com/addzero/web/modules/ai/chat/ChatController.class]: Unsatisfied dependency expressed through constructor parameter 0: Error creating bean with name 'vectorStore' defined in class path resource [org/springframework/ai/autoconfigure/vectorstore/pgvector/PgVectorStoreAutoConfiguration.class]: StatementCallback; bad SQL grammar [CREATE EXTENSION IF NOT EXISTS vector]
at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:795) ~[spring-beans-6.1.14.jar:6.1.14]
at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:237) ~[spring-beans-6.1.14.jar:6.1.14]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:1375) ~[spring-beans-6.1.14.jar:6.1.14]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1212) ~[spring-beans-6.1.14.jar:6.1.14]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:562) ~[spring-beans-6.1.14.jar:6.1.14]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:522) ~[spring-beans-6.1.14.jar:6.1.14]
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:337) ~[spring-beans-6.1.14.jar:6.1.14]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-6.1.14.jar:6.1.14]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:335) ~[spring-beans-6.1.14.jar:6.1.14]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:200) ~[spring-beans-6.1.14.jar:6.1.14]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:975) ~[spring-beans-6.1.14.jar:6.1.14]
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:971) ~[spring-context-6.1.14.jar:6.1.14]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:625) ~[spring-context-6.1.14.jar:6.1.14]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:146) ~[spring-boot-3.3.5.jar:3.3.5]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:754) ~[spring-boot-3.3.5.jar:3.3.5]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:456) ~[spring-boot-3.3.5.jar:3.3.5]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:335) ~[spring-boot-3.3.5.jar:3.3.5]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1363) ~[spring-boot-3.3.5.jar:3.3.5]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1352) ~[spring-boot-3.3.5.jar:3.3.5]
at com.addzero.web.AppKt.main(App.kt:18) ~[main/:na]
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'vectorStore' defined in class path resource [org/springframework/ai/autoconfigure/vectorstore/pgvector/PgVectorStoreAutoConfiguration.class]: StatementCallback; bad SQL grammar [CREATE EXTENSION IF NOT EXISTS vector]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1806) ~[spring-beans-6.1.14.jar:6.1.14]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:600) ~[spring-beans-6.1.14.jar:6.1.14]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:522) ~[spring-beans-6.1.14.jar:6.1.14]
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:337) ~[spring-beans-6.1.14.jar:6.1.14]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-6.1.14.jar:6.1.14]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:335) ~[spring-beans-6.1.14.jar:6.1.14]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:200) ~[spring-beans-6.1.14.jar:6.1.14]
at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:254) ~[spring-beans-6.1.14.jar:6.1.14]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1443) ~[spring-beans-6.1.14.jar:6.1.14]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1353) ~[spring-beans-6.1.14.jar:6.1.14]
at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:904) ~[spring-beans-6.1.14.jar:6.1.14]
at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:782) ~[spring-beans-6.1.14.jar:6.1.14]
... 19 common frames omitted
Caused by: org.springframework.jdbc.BadSqlGrammarException: StatementCallback; bad SQL grammar [CREATE EXTENSION IF NOT EXISTS vector]
at org.springframework.jdbc.support.SQLStateSQLExceptionTranslator.doTranslate(SQLStateSQLExceptionTranslator.java:112) ~[spring-jdbc-6.1.13.jar:6.1.13]
at org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:107) ~[spring-jdbc-6.1.13.jar:6.1.13]
at org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:116) ~[spring-jdbc-6.1.13.jar:6.1.13]
at org.springframework.jdbc.core.JdbcTemplate.translateException(JdbcTemplate.java:1548) ~[spring-jdbc-6.1.13.jar:6.1.13]
at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:408) ~[spring-jdbc-6.1.13.jar:6.1.13]
at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:444) ~[spring-jdbc-6.1.13.jar:6.1.13]
at org.springframework.ai.vectorstore.PgVectorStore.afterPropertiesSet(PgVectorStore.java:332) ~[spring-ai-pgvector-store-1.0.0-M4.jar:1.0.0-M4]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1853) ~[spring-beans-6.1.14.jar:6.1.14]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1802) ~[spring-beans-6.1.14.jar:6.1.14]
... 30 common frames omitted
Caused by: org.postgresql.util.PSQLException: ERROR: type "vector" already exists
at org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorImpl.java:2725) ~[postgresql-42.7.3.jar:42.7.3]
at org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:2412) ~[postgresql-42.7.3.jar:42.7.3]
at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:371) ~[postgresql-42.7.3.jar:42.7.3]
at org.postgresql.jdbc.PgStatement.executeInternal(PgStatement.java:502) ~[postgresql-42.7.3.jar:42.7.3]
at org.postgresql.jdbc.PgStatement.execute(PgStatement.java:419) ~[postgresql-42.7.3.jar:42.7.3]
at org.postgresql.jdbc.PgStatement.executeWithFlags(PgStatement.java:341) ~[postgresql-42.7.3.jar:42.7.3]
at org.postgresql.jdbc.PgStatement.executeCachedSql(PgStatement.java:326) ~[postgresql-42.7.3.jar:42.7.3]
at org.postgresql.jdbc.PgStatement.executeWithFlags(PgStatement.java:302) ~[postgresql-42.7.3.jar:42.7.3]
at org.postgresql.jdbc.PgStatement.execute(PgStatement.java:297) ~[postgresql-42.7.3.jar:42.7.3]
at com.zaxxer.hikari.pool.ProxyStatement.execute(ProxyStatement.java:94) ~[HikariCP-5.1.0.jar:na]
at com.zaxxer.hikari.pool.HikariProxyStatement.execute(HikariProxyStatement.java) ~[HikariCP-5.1.0.jar:na]
at org.springframework.jdbc.core.JdbcTemplate$1ExecuteStatementCallback.doInStatement(JdbcTemplate.java:435) ~[spring-jdbc-6.1.13.jar:6.1.13]
at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:393) ~[spring-jdbc-6.1.13.jar:6.1.13]
... 34 common frames omitted

Environment
Please provide as many details as possible: Spring AI version, Java version, which vector store you use if any, etc

Steps to reproduce
Steps to reproduce the issue.

Expected behavior
A clear and concise description of what you expected to happen.

Minimal Complete Reproducible example
Please provide a failing test or a minimal complete verifiable example that reproduces the issue.
Bug reports that are reproducible will take priority in resolution over reports that are not reproducible.

Start with PgVectorStore.afterPropertiesSet and the PgVectorStoreAutoConfiguration entry point shown in the stack trace, then inspect the application startup path at App.kt:18. Reproduce the failure with an existing PostgreSQL vector type and verify whether vectorStore initialization can complete without the reported type-conflict error.