FATAL [main] [UpgradeLauncher] Failed to upgrade Bamboo
java.util.concurrent.ExecutionException: java.lang.IncompatibleClassChangeError
	at java.util.concurrent.FutureTask.report(FutureTask.java:122) ~[?:1.8.0_05]
	at java.util.concurrent.FutureTask.get(FutureTask.java:192) ~[?:1.8.0_05]
	at com.atlassian.bamboo.upgrade.UpgradeLauncher.upgradeAndStartBamboo(UpgradeLauncher.java:120) ~[atlassian-bamboo-web-9.2.1.jar:?]
	at com.atlassian.bamboo.upgrade.UpgradeLauncher.contextInitialized(UpgradeLauncher.java:52) ~[atlassian-bamboo-web-9.2.1.jar:?]
	at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4764) ~[catalina.jar:9.0.71]
	at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5222) ~[catalina.jar:9.0.71]
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) ~[catalina.jar:9.0.71]
	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1393) ~[catalina.jar:9.0.71]
	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1383) ~[catalina.jar:9.0.71]
	at java.util.concurrent.FutureTask.run(FutureTask.java:266) ~[?:1.8.0_05]

[...]

Caused by: java.lang.IncompatibleClassChangeError
	at org.hibernate.query.criteria.internal.path.AbstractPathImpl.get(AbstractPathImpl.java:127) ~[hibernate-core-5.6.10.Final-atlassian-1.jar:5.6.10.Final-atlassian-1]
	at org.hibernate.query.criteria.internal.path.AbstractPathImpl.get(AbstractPathImpl.java:189) ~[hibernate-core-5.6.10.Final-atlassian-1.jar:5.6.10.Final-atlassian-1]
	at com.atlassian.bamboo.index.quicksearch.QuickSearchItemDaoImpl$1.apply(QuickSearchItemDaoImpl.java:31) ~[atlassian-bamboo-persistence-9.2.1.jar:?]
	at com.atlassian.bamboo.jpa.JpaUtils$CriteriaQuery.getResultList(JpaUtils.java:189) ~[atlassian-bamboo-persistence-9.2.1.jar:?]
	at com.atlassian.bamboo.index.quicksearch.QuickSearchItemDaoImpl.reIndexItem(QuickSearchItemDaoImpl.java:33) ~[atlassian-bamboo-persistence-9.2.1.jar:?]
	at com.atlassian.bamboo.index.quicksearch.QuickSearchItemDaoImpl.reIndexItem(QuickSearchItemDaoImpl.java:23) ~[atlassian-bamboo-persistence-9.2.1.jar:?]
	at sun.reflect.GeneratedMethodAccessor439.invoke(Unknown Source) ~[?:?]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_05]
	at java.lang.reflect.Method.invoke(Method.java:483) ~[?:1.8.0_05]
	at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:344) ~[spring-aop-5.3.24.jar:5.3.24]
	at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:198) ~[spring-aop-5.3.24.jar:5.3.24]
[...]