EDIT

While swapping synonym to taxon, the descriptions are cloned but cannot be deleted with the old accepted taxon because they are still related to the descriptive dataset

last remote method : http://test.e-taxonomy.eu:80/cdmserver/rem_conf_am/remoting/taxon.service
last remote request client time : 2021-02-26T11:07:31.538
last remote request response header time : Fri, 26 Feb 2021 11:07:31 GMT
client error time : 2021-02-26T11:07:32.475
login : admin
editor version : 5.21.0.202102260844
server : test.e-taxonomy.eu (edit-test) / rem_conf_am
schema version : 5.18.6.0.20201124
os : Windows Server 2012 R2 6.3 amd64
java : 1.8.0_131
org.eclipse.swt.SWTException: Failed to execute runnable (org.hibernate.ObjectDeletedException: deleted object would be re-saved by cascade (remove deleted object from associations): [eu.etaxonomy.cdm.model.description.TaxonDescription#2823])
                at org.eclipse.swt.SWT.error(SWT.java:4533)
                at org.eclipse.swt.SWT.error(SWT.java:4448)
                at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:185)
                at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:4211)
                at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3827)
                at org.eclipse.jface.window.Window.runEventLoop(Window.java:818)
                at org.eclipse.jface.window.Window.open(Window.java:794)
                at org.eclipse.jface.dialogs.MessageDialog.open(MessageDialog.java:396)
                at org.eclipse.jface.dialogs.MessageDialog.open(MessageDialog.java:424)
                at org.eclipse.jface.dialogs.MessageDialog.openWarning(MessageDialog.java:532)
                at eu.etaxonomy.taxeditor.model.MessagingUtils$4.run(MessagingUtils.java:583)
                at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35)
                at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:182)
                at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:4211)
                at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3827)
                at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$4.run(PartRenderingEngine.java:1121)
                at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:336)
                at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1022)
...
Caused by: org.hibernate.ObjectDeletedException: deleted object would be re-saved by cascade (remove deleted object from associations): [eu.etaxonomy.cdm.model.description.TaxonDescription#2823]
                at org.hibernate.internal.SessionImpl.forceFlush(SessionImpl.java:1314)
                at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:170)
                at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.performSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:97)
                at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:73)
                at org.hibernate.internal.SessionImpl.fireSaveOrUpdate(SessionImpl.java:651)
                at org.hibernate.internal.SessionImpl.saveOrUpdate(SessionImpl.java:643)
                at org.hibernate.engine.spi.CascadingActions$5.cascade(CascadingActions.java:218)
                at org.hibernate.engine.internal.Cascade.cascadeToOne(Cascade.java:423)
                at org.hibernate.engine.internal.Cascade.cascadeAssociation(Cascade.java:348)
                at org.hibernate.engine.internal.Cascade.cascadeProperty(Cascade.java:187)
                at org.hibernate.engine.internal.Cascade.cascadeCollectionElements(Cascade.java:456)
                at org.hibernate.engine.internal.Cascade.cascadeCollection(Cascade.java:388)
                at org.hibernate.engine.internal.Cascade.cascadeAssociation(Cascade.java:351)
                at org.hibernate.engine.internal.Cascade.cascadeProperty(Cascade.java:187)
                at org.hibernate.engine.internal.Cascade.cascade(Cascade.java:136)
                at org.hibernate.event.internal.AbstractFlushingEventListener.cascadeOnFlush(AbstractFlushingEventListener.java:150)
                at org.hibernate.event.internal.AbstractFlushingEventListener.prepareEntityFlushes(AbstractFlushingEventListener.java:141)
                at org.hibernate.event.internal.AbstractFlushingEventListener.flushEverythingToExecutions(AbstractFlushingEventListener.java:74)
                at org.hibernate.event.internal.DefaultAutoFlushEventListener.onAutoFlush(DefaultAutoFlushEventListener.java:44)
                at org.hibernate.internal.SessionImpl.autoFlushIfRequired(SessionImpl.java:1264)
                at org.hibernate.internal.SessionImpl.list(SessionImpl.java:1780)
                at org.hibernate.internal.CriteriaImpl.list(CriteriaImpl.java:363)
                at eu.etaxonomy.cdm.persistence.dao.hibernate.common.CdmEntityDaoBase.findByUuid(CdmEntityDaoBase.java:426)
                at eu.etaxonomy.cdm.persistence.dao.hibernate.common.CdmEntityDaoBase.findByUuid(CdmEntityDaoBase.java:413)
                at eu.etaxonomy.cdm.persistence.dao.hibernate.common.VersionableDaoBase.findByUuid(VersionableDaoBase.java:67)
                at eu.etaxonomy.cdm.persistence.dao.hibernate.common.VersionableDaoBase.findByUuid(VersionableDaoBase.java:36)
                at eu.etaxonomy.cdm.persistence.dao.hibernate.common.CdmEntityDaoBase.load(CdmEntityDaoBase.java:758)
                at eu.etaxonomy.cdm.persistence.dao.hibernate.common.VersionableDaoBase.load(VersionableDaoBase.java:93)
                at eu.etaxonomy.cdm.persistence.dao.hibernate.common.VersionableDaoBase.load(VersionableDaoBase.java:36)
                at eu.etaxonomy.cdm.api.service.ServiceBase.load(ServiceBase.java:190)
                at eu.etaxonomy.cdm.api.service.TaxonServiceImpl.isDeletable(TaxonServiceImpl.java:3017)
                at eu.etaxonomy.cdm.api.service.TaxonServiceImpl.deleteSynonym(TaxonServiceImpl.java:1235)
                at eu.etaxonomy.cdm.api.service.TaxonServiceImpl.swapSynonymAndAcceptedTaxon(TaxonServiceImpl.java:316)
                at eu.etaxonomy.cdm.api.service.TaxonServiceImpl.swapSynonymAndAcceptedTaxon(TaxonServiceImpl.java:3378)
                at sun.reflect.GeneratedMethodAccessor1872.invoke(Unknown Source)
                at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
                at java.lang.reflect.Method.invoke(Method.java:498)
                at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:333)
                at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:190)
                at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)
                at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:99)
                at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:283)
                at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96)
                at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
                at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:213)
                at com.sun.proxy.$Proxy705.swapSynonymAndAcceptedTaxon(Unknown Source)
                at sun.reflect.GeneratedMethodAccessor1872.invoke(Unknown Source)
                at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
                at java.lang.reflect.Method.invoke(Method.java:498)
                at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:333)
                at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:190)
                at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)
                at org.springframework.remoting.support.RemoteInvocationTraceInterceptor.invoke(RemoteInvocationTraceInterceptor.java:78)
                at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
                at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:213)
                at com.sun.proxy.$Proxy1155.swapSynonymAndAcceptedTaxon(Unknown Source)
                at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
                at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
                at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
                at java.lang.reflect.Method.invoke(Method.java:498)
                at org.springframework.remoting.support.RemoteInvocation.invoke(RemoteInvocation.java:212)
                at eu.etaxonomy.cdm.api.remoting.DebuggingRemoteInvocationExecutor.invoke(DebuggingRemoteInvocationExecutor.java:52)