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there is an exist entity named student.now i used command line 

jhipster entity student

to add a field birthday type of Instant.when i restart app after jhipster generate code,idea throw

2018-08-29 13:35:59.651 ERROR 12500 --- [mo-1-Executor-1] i.g.j.c.liquibase.AsyncSpringLiquibase : Liquibase could not start correctly, your database is NOT ready: Validation Failed: 1 change sets check sum config/liquibase/changelog/20180829023724_added_entity_Student.xml::20180829023724-1::jhipster was: 7:aba89ebafe84e997111f7ce081afc26c but is now: 7:7d10331a42bc3d1b3d90f86c2fc5ab2b

liquibase.exception.ValidationFailedException: Validation Failed: 1 change sets check sum config/liquibase/changelog/20180829023724_added_entity_Student.xml::20180829023724-1::jhipster was: 7:aba89ebafe84e997111f7ce081afc26c but is now: 7:7d10331a42bc3d1b3d90f86c2fc5ab2b

at liquibase.changelog.DatabaseChangeLog.validate(DatabaseChangeLog.java:266) at liquibase.Liquibase.update(Liquibase.java:210) at liquibase.Liquibase.update(Liquibase.java:192) at liquibase.integration.spring.SpringLiquibase.performUpdate(SpringLiquibase.java:431) at liquibase.integration.spring.SpringLiquibase.afterPropertiesSet(SpringLiquibase.java:388) at io.github.jhipster.config.liquibase.AsyncSpringLiquibase.initDb(AsyncSpringLiquibase.java:103) at io.github.jhipster.config.liquibase.AsyncSpringLiquibase.lambda$afterPropertiesSet$0(AsyncSpringLiquibase.java:83) at io.github.jhipster.async.ExceptionHandlingAsyncTaskExecutor.lambda$createWrappedRunnable$1(ExceptionHandlingAsyncTaskExecutor.java:68) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at java.lang.Thread.run(Thread.java:745)

and i cant save a new student at all,why?

Alien
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  • Possible duplicate of [jhipster liquibase validation error after modify entity](https://stackoverflow.com/questions/43207163/jhipster-liquibase-validation-error-after-modify-entity) – Gaël Marziou Aug 29 '18 at 07:58
  • https://stackoverflow.com/questions/28216307/how-to-modify-existing-entity-generated-with-jhipster - there is a coment in the site that tells what you shuoldnt override when updating an entity, mayby this will help – boandriy Aug 31 '18 at 06:55

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