Integrity constraint ACT_FK_VAR_EXE violated - child record found

1318327463929  E CommandContextError while closing command context 
org.apache.ibatis.exceptions.PersistenceException: 
### Error updating database.  Cause: java.sql.SQLException: ORA-02292: integrity constraint (ZV_ACTIVITI.ACT_FK_VAR_EXE) violated - child record found

### The error may involve org.activiti.engine.impl.persistence.entity.ExecutionEntity.deleteExecution-Inline
### The error occurred while setting parameters
### Cause: java.sql.SQLException: ORA-02292: integrity constraint (ZV_ACTIVITI.ACT_FK_VAR_EXE) violated - child record found

	at org.apache.ibatis.exceptions.ExceptionFactory.wrapException(ExceptionFactory.java:8)
	at org.apache.ibatis.session.defaults.DefaultSqlSession.update(DefaultSqlSession.java:120)
	at org.apache.ibatis.session.defaults.DefaultSqlSession.delete(DefaultSqlSession.java:131)
	at org.activiti.engine.impl.db.DbSqlSession$DeleteById.execute(DbSqlSession.java:146)
	at org.activiti.engine.impl.db.DbSqlSession.flushDeletes(DbSqlSession.java:444)
	at org.activiti.engine.impl.db.DbSqlSession.flush(DbSqlSession.java:349)
	at org.activiti.engine.impl.interceptor.CommandContext.flushSessions(CommandContext.java:147)
	at org.activiti.engine.impl.interceptor.CommandContext.close(CommandContext.java:103)
	at org.activiti.engine.impl.interceptor.CommandContextInterceptor.execute(CommandContextInterceptor.java:49)
	at org.activiti.engine.impl.interceptor.LogInterceptor.execute(LogInterceptor.java:33)
	at org.activiti.engine.impl.TaskServiceImpl.complete(TaskServiceImpl.java:144)
	at lv.mebius.workflow.Workflow.completeTask(Workflow.java:320)
	at lv.mebius.workflow.Workflow.action(Workflow.java:267)
	at lv.mebius.workflow.Workflow.action(Workflow.java:288)
	at lv.mebius.ge.web.action.ZrDocumentsOutAction.save(ZrDocumentsOutAction.java:520)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at org.apache.struts.actions.DispatchAction.dispatchMethod(DispatchAction.java:274)
	at lv.mebius.common.web.BaseAction.dispatchCustom(BaseAction.java:355)
	at lv.mebius.common.web.BaseAction.execute_aroundBody114(BaseAction.java:321)
	at lv.mebius.common.web.BaseAction$AjcClosure115.run(BaseAction.java:1)
	at org.aspectj.runtime.reflect.JoinPointImpl.proceed(JoinPointImpl.java:149)
	at lv.mebius.common.aspects.PerfStats.proceed_aroundBody10(PerfStats.java:55)
	at lv.mebius.common.aspects.PerfStats.logActionStats(PerfStats.java:55)
	at lv.mebius.common.web.BaseAction.execute(BaseAction.java:255)
	at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:419)
	at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:224)
	at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1194)
	at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:641)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:304)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
	at lv.mebius.common.servlet.SetLocaleFilter.doFilter(SetLocaleFilter.java:51)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
	at org.displaytag.filter.ResponseOverrideFilter.doFilter(ResponseOverrideFilter.java:125)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
	at lv.mebius.common.auth.AuthFilter.doFilter(AuthFilter.java:70)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:240)
	at org.apache.catalina.core.StandardContextValve.__invoke(StandardContextValve.java:164)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:462)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:164)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
	at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:563)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:399)
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:317)
	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:204)
	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:182)
	at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:311)
	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
	at java.lang.Thread.run(Thread.java:680)
Caused by: java.sql.SQLException: ORA-02292: integrity constraint (ZV_ACTIVITI.ACT_FK_VAR_EXE) violated - child record found

	at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:113)
	at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:331)
	at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:288)
	at oracle.jdbc.driver.T4C8Oall.receive(T4C8Oall.java:754)
	at oracle.jdbc.driver.T4CPreparedStatement.doOall8(T4CPreparedStatement.java:219)
	at oracle.jdbc.driver.T4CPreparedStatement.executeForRows(T4CPreparedStatement.java:972)
	at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:1192)
	at oracle.jdbc.driver.OraclePreparedStatement.executeInternal(OraclePreparedStatement.java:3415)
	at oracle.jdbc.driver.OraclePreparedStatement.execute(OraclePreparedStatement.java:3521)
	at org.apache.tomcat.dbcp.dbcp.DelegatingPreparedStatement.execute(DelegatingPreparedStatement.java:172)
	at org.apache.tomcat.dbcp.dbcp.DelegatingPreparedStatement.execute(DelegatingPreparedStatement.java:172)
	at org.apache.ibatis.executor.statement.PreparedStatementHandler.update(PreparedStatementHandler.java:22)
	at org.apache.ibatis.executor.statement.RoutingStatementHandler.update(RoutingStatementHandler.java:51)
	at org.apache.ibatis.executor.SimpleExecutor.doUpdate(SimpleExecutor.java:29)
	at org.apache.ibatis.executor.BaseExecutor.update(BaseExecutor.java:75)
	at org.apache.ibatis.executor.CachingExecutor.update(CachingExecutor.java:43)
	at org.apache.ibatis.session.defaults.DefaultSqlSession.update(DefaultSqlSession.java:118)
	... 58 more