ERRO INeSPERADO

Boa tarde a todos.
Gostaria de saber o motivo de não conseguir salvar a nf-e.. sempre que tento salvar aparece:


OCORREU UM ERRO INESPERADO

org.hibernate.exception.GenericJDBCException: could not get or update next value
javax.persistence.PersistenceException: org.hibernate.exception.GenericJDBCException: could not get or update next value
at org.hibernate.ejb.AbstractEntityManagerImpl.throwPersistenceException(AbstractEntityManagerImpl.java:630)
at org.hibernate.ejb.AbstractEntityManagerImpl.merge(AbstractEntityManagerImpl.java:237)
at br.gov.sp.fazenda.dsge.model.dao.DSGEBaseDAO.update(DSGEBaseDAO.java:78)
at br.gov.sp.fazenda.dsen.model.business.NotaFiscalBusiness.alterarSemTransaction(NotaFiscalBusiness.java:533)
at br.gov.sp.fazenda.dsen.model.business.NotaFiscalBusiness$$EnhancerByCGLIB$$3d0a3d61.CGLIB$alterarSemTransaction$9(<generated>)
at br.gov.sp.fazenda.dsen.model.business.NotaFiscalBusiness$$EnhancerByCGLIB$$3d0a3d61$$FastClassByCGLIB$$2002fab9.invoke(<generated>)
at net.sf.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:167)
at br.gov.sp.fazenda.dsge.model.dao.util.DSGEDAOInterceptorHelper.intercept(DSGEDAOInterceptorHelper.java:66)
at br.gov.sp.fazenda.dsen.model.business.NotaFiscalBusiness$$EnhancerByCGLIB$$3d0a3d61.alterarSemTransaction(<generated>)
at br.gov.sp.fazenda.dsen.model.business.NotaFiscalBusiness.salvarSemTransaction(NotaFiscalBusiness.java:491)
at br.gov.sp.fazenda.dsen.model.business.NotaFiscalBusiness$$EnhancerByCGLIB$$3d0a3d61.CGLIB$salvarSemTransaction$26(<generated>)
at br.gov.sp.fazenda.dsen.model.business.NotaFiscalBusiness$$EnhancerByCGLIB$$3d0a3d61$$FastClassByCGLIB$$2002fab9.invoke(<generated>)
at net.sf.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:167)
at br.gov.sp.fazenda.dsge.model.dao.util.DSGEDAOInterceptorHelper.intercept(DSGEDAOInterceptorHelper.java:66)
at br.gov.sp.fazenda.dsen.model.business.NotaFiscalBusiness$$EnhancerByCGLIB$$3d0a3d61.salvarSemTransaction(<generated>)
at br.gov.sp.fazenda.dsen.model.business.NotaFiscalBusiness.salvar(NotaFiscalBusiness.java:463)
at br.gov.sp.fazenda.dsen.model.business.NotaFiscalBusiness$$EnhancerByCGLIB$$3d0a3d61.CGLIB$salvar$42(<generated>)
at br.gov.sp.fazenda.dsen.model.business.NotaFiscalBusiness$$EnhancerByCGLIB$$3d0a3d61$$FastClassByCGLIB$$2002fab9.invoke(<generated>)
at net.sf.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:167)
at br.gov.sp.fazenda.dsge.model.dao.util.DSGEDAOInterceptorHelper.intercept(DSGEDAOInterceptorHelper.java:55)
at br.gov.sp.fazenda.dsen.model.business.NotaFiscalBusiness$$EnhancerByCGLIB$$3d0a3d61.salvar(<generated>)
at br.gov.sp.fazenda.dsen.model.facade.NotaFiscalFacade.salvarNotaFiscal(NotaFiscalFacade.java:221)
at br.gov.sp.fazenda.dsen.controller.nfe.ManterNotaFiscalController.a(ManterNotaFiscalController.java:312)
at br.gov.sp.fazenda.dsen.controller.nfe.ManterNotaFiscalController.actionPerformed(ManterNotaFiscalController.java:662)
at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source)
at java.awt.Component.processMouseEvent(Unknown Source)
at javax.swing.JComponent.processMouseEvent(Unknown Source)
at java.awt.Component.processEvent(Unknown Source)
at java.awt.Container.processEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Window.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
at java.awt.EventQueue.access$200(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)
Caused by: org.hibernate.exception.GenericJDBCException: could not get or update next value
at org.hibernate.exception.SQLStateConverter.handledNonSpecificException(SQLStateConverter.java:103)
at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:91)
at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:43)
at org.hibernate.engine.TransactionHelper$1Work.doWork(TransactionHelper.java:41)
at org.hibernate.engine.transaction.Isolater$JdbcDelegate.delegateWork(Isolater.java:187)
at org.hibernate.engine.transaction.Isolater.doIsolatedWork(Isolater.java:43)
at org.hibernate.engine.TransactionHelper.doWorkInNewTransaction(TransactionHelper.java:51)
at org.hibernate.id.MultipleHiLoPerTableGenerator.generate(MultipleHiLoPerTableGenerator.java:186)
at org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:99)
at org.hibernate.ejb.event.EJB3MergeEventListener.saveWithGeneratedId(EJB3MergeEventListener.java:43)
at org.hibernate.event.def.DefaultMergeEventListener.entityIsTransient(DefaultMergeEventListener.java:186)
at org.hibernate.event.def.DefaultMergeEventListener.onMerge(DefaultMergeEventListener.java:123)
at org.hibernate.event.def.DefaultMergeEventListener.onMerge(DefaultMergeEventListener.java:53)
at org.hibernate.impl.SessionImpl.fireMerge(SessionImpl.java:677)
at org.hibernate.impl.SessionImpl.merge(SessionImpl.java:661)
at org.hibernate.impl.SessionImpl.merge(SessionImpl.java:665)
at org.hibernate.ejb.AbstractEntityManagerImpl.merge(AbstractEntityManagerImpl.java:228)
... 58 more
Caused by: java.sql.SQLException: An SQL data change is not permitted for a read-only connection, user or database.
at org.apache.derby.client.am.SQLExceptionFactory.getSQLException(Unknown Source)
at org.apache.derby.client.am.SqlException.getSQLException(Unknown Source)
at org.apache.derby.client.am.PreparedStatement.executeUpdate(Unknown Source)
at org.hibernate.id.MultipleHiLoPerTableGenerator.doWorkInCurrentTransaction(MultipleHiLoPerTableGenerator.java:168)
at org.hibernate.engine.TransactionHelper$1Work.doWork(TransactionHelper.java:38)
... 71 more
Caused by: org.apache.derby.client.am.SqlException: An SQL data change is not permitted for a read-only connection, user or database.
at org.apache.derby.client.am.Statement.completeExecute(Unknown Source)
at org.apache.derby.client.net.NetStatementReply.parseEXCSQLSTTreply(Unknown Source)
at org.apache.derby.client.net.NetStatementReply.readExecute(Unknown Source)
at org.apache.derby.client.net.StatementReply.readExecute(Unknown Source)
at org.apache.derby.client.net.NetPreparedStatement.readExecute_(Unknown Source)
at org.apache.derby.client.am.PreparedStatement.readExecute(Unknown Source)
at org.apache.derby.client.am.PreparedStatement.flowExecute(Unknown Source)
at org.apache.derby.client.am.PreparedStatement.executeUpdateX(Unknown Source)
... 74 more