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org.hibernate.exception.LockAcquisitionException: Could not execute JDBC batch update
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org.hibernate.PropertyValueException: not-null property references a null or transient value: odwzorowania.Zlecenie.firma	at org.hibernate.engine.Nullability.checkNullability(Nullability.java:72)	at org.hibernate.event.def.DefaultFlushEntityEventListener.scheduleUpdate(DefaultFlushEntityEventListener.java:270)	at org.hibernate.event.def.DefaultFlushEntityEventListener.onFlushEntity(DefaultFlushEntityEventListener.java:128)	at org.hibernate.event.def.AbstractFlushingEventListener.flushEntities(AbstractFlushingEventListener.java:196)	at org.hibernate.event.def.AbstractFlushingEventListener.flushEverythingToExecutions(AbstractFlushingEventListener.java:76)	at org.hibernate.event.def.DefaultAutoFlushEventListener.onAutoFlush(DefaultAutoFlushEventListener.java:35)	at org.hibernate.impl.SessionImpl.autoFlushIfRequired(SessionImpl.java:969)	at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1114)	at org.hibernate.impl.QueryImpl.list(QueryImpl.java:79)	at org.hibernate.ejb.QueryImpl.getResultList(QueryImpl.java:65)	at controllery.FirmaController.get(FirmaController.java:84)	at validatory.FirmyValidator.(FirmyValidator.java:32)	at sun.reflect.GeneratedConstructorAccessor154.newInstance(Unknown Source)	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)	at java.lang.reflect.Constructor.newInstance(Constructor.java:532)	at java.lang.Class.newInstance0(Class.java:372)	at java.lang.Class.newInstance(Class.java:325)	at com.sun.faces.application.ApplicationImpl.newThing(ApplicationImpl.java:1699)	at com.sun.faces.application.ApplicationImpl.createValidator(ApplicationImpl.java:1557)	at com.sun.faces.facelets.tag.jsf.ValidatorTagHandlerDelegateImpl.createValidator(ValidatorTagHandlerDelegateImpl.java:238)	at com.sun.faces.facelets.tag.jsf.ValidatorTagHandlerDelegateImpl.applyAttachedObject(ValidatorTagHandlerDelegateImpl.java:132)	at com.sun.faces.facelets.tag.jsf.ValidatorTagHandlerDelegateImpl.applyNested(ValidatorTagHandlerDelegateImpl.java:205)	at com.sun.faces.facelets.tag.jsf.ValidatorTagHandlerDelegateImpl.apply(ValidatorTagHandlerDelegateImpl.java:87)	at javax.faces.view.facelets.DelegatingMetaTagHandler.apply(DelegatingMetaTagHandler.java:120)	at javax.faces.view.facelets.CompositeFaceletHandler.apply(CompositeFaceletHandler.java:98)	at javax.faces.view.facelets.DelegatingMetaTagHandler.applyNextHandler(DelegatingMetaTagHandler.java:137)	at com.sun.faces.facelets.tag.jsf.ComponentTagHandlerDelegateImpl.apply(ComponentTagHandlerDelegateImpl.java:188)	at javax.faces.view.facelets.DelegatingMetaTagHandler.apply(DelegatingMetaTagHandler.java:120)	at javax.faces.view.facelets.CompositeFaceletHandler.apply(CompositeFaceletHandler.java:98)	at javax.faces.view.facelets.DelegatingMetaTagHandler.applyNextHandler(DelegatingMetaTagHandler.java:137)	at com.sun.faces.facelets.tag.jsf.ComponentTagHandlerDelegateImpl.apply(ComponentTagHandlerDelegateImpl.java:188)	at javax.faces.view.facelets.DelegatingMetaTagHandler.apply(DelegatingMetaTagHandler.java:120)	at javax.faces.view.facelets.CompositeFaceletHandler.apply(CompositeFaceletHandler.java:98)	at javax.faces.view.facelets.DelegatingMetaTagHandler.applyNextHandler(DelegatingMetaTagHandler.java:137)	at com.sun.faces.facelets.tag.jsf.ComponentTagHandlerDelegateImpl.apply(ComponentTagHandlerDelegateImpl.java:188)	at javax.faces.view.facelets.DelegatingMetaTagHandler.apply(DelegatingMetaTagHandler.java:120)	at javax.faces.view.facelets.CompositeFaceletHandler.apply(CompositeFaceletHandler.java:98)	at com.sun.faces.facelets.compiler.NamespaceHandler.apply(NamespaceHandler.java:93)	at javax.faces.view.facelets.CompositeFaceletHandler.apply(CompositeFaceletHandler.java:98)	at com.sun.faces.facelets.compiler.EncodingHandler.apply(EncodingHandler.java:86)	at com.sun.faces.facelets.impl.DefaultFacelet.apply(DefaultFacelet.java:152)	at com.sun.faces.application.view.FaceletViewHandlingStrategy.buildView(FaceletViewHandlingStrategy.java:769)	at com.sun.faces.application.view.StateManagementStrategyImpl.restoreView(StateManagementStrategyImpl.java:232)	at com.sun.faces.application.StateManagerImpl.restoreView(StateManagerImpl.java:188)	at com.sun.faces.application.view.ViewHandlingStrategy.restoreView(ViewHandlingStrategy.java:123)	at com.sun.faces.application.view.FaceletViewHandlingStrategy.restoreView(FaceletViewHandlingStrategy.java:452)	at com.sun.faces.application.view.MultiViewHandler.restoreView(MultiViewHandler.java:148)	at com.sun.faces.lifecycle.RestoreViewPhase.execute(RestoreViewPhase.java:192)	at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)	at com.sun.faces.lifecycle.RestoreViewPhase.doPhase(RestoreViewPhase.java:116)	at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118)	at javax.faces.webapp.FacesServlet.service(FacesServlet.java:409)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:225)	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:169)	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)	at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:927)	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)	at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:999)	at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:565)	at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:309)	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)	at java.lang.Thread.run(Thread.java:636)