Few days ago I switched my Java Spring Boot project from Hibernate ORM 6.1.7 to Hibernate ORM 6.2.1.
The underlying database is MySQL 8 which supports enum data type.

In one of my entities I have `enum` which is annotated by @Enumerated(EnumType.STRING) and so far it was working as expected - varchar table column was created by Hibernate few years ago.

spring.jpa.hibernate.ddl-auto = validate

After switching to Hibernate ORM 6.2.1 this table column was converted to MySQL’s enum data type.
When I try to start my app with spring.jpa.hibernate.ddl-auto set to validate - an exception is thrown:

Caused by: org.hibernate.tool.schema.spi.SchemaManagementException:
Schema-validation: wrong column type encountered in column [sign_position]
in table [custom_currency];
found [enum (Types#CHAR)], but expecting [varchar(255) (Types#VARCHAR)]

If I change ddl-auto setting to update or none, the table column of enum type stays as it is and application can boot up.

Steps are:

1. spring.jpa.hibernate.ddl-auto = update
2. run the app
3. database is updated
4. stop the app
5. spring.jpa.hibernate.ddl-auto = validate
6. run the app
7. exception is thrown

Hibernate Discourse post: https://discourse.hibernate.org/t/hibernate-validate-fails-on-enum/7535