Tolerate Flyway 12's removal of the method for configuring cleanOnValidationError

[mil7]

Hi there,

with Flyway's update to v12 cleanOnValidationError configuration has now finally been removed.

Unfortunately in Spring Boot v3.5.10 the FlywayAutoConfiguration warns that the configuration is deprecated but still depends on code that does not exist anymore in Flyway v12. The result is a breaking NoSuchMethodError.

I know EOL of Spring Boot v3.5 is pretty close but

• the fix should be simple enough
• maybe Spring Boot v4 has trouble with the same issue

I dug out the discussion from January 2025 which concluded in the deprecation's documentation.

#43890 <= #43770

[wilkinsona]

Spring Boot 4 is not affected as the deprecated property was removed as is appropriate for a new major.

I'm not sure that we want to try and be forwards compatible with new major versions of Flyway as it adds to our maintenance burden. I'll discuss it with the rest of the team.

[wilkinsona]

We discussed this today and we're going to update 3.5 to tolerate the method's removal. We don't consider this to be a bug as we do not and will not officially support Flyway 12 with Boot 3.5 so the issue is labelled as a task. Future problems with Flyway 12 may or may not be addressed depending on the amount of work and complexity involved.

[philwebb]

Closing in favor of PR #49059. Thanks @nosan!