Encounter WebService - encounterProviders Error

"org.hibernate.exception.ConstraintViolationException: could not execute statement\n\tat org.hibernate.exception.internal.SQLExceptionTypeDelegate.convert(SQLExceptionTypeDelegate.java:72)\n\tat org.hibernate.exception.internal.StandardSQLExceptionConverter.convert(StandardSQLExceptionConverter.java:49)\n\tat org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:126)\n\tat org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:112)\n\tat org.hibernate.engine.jdbc.internal.ResultSetReturnImpl.executeUpdate(ResultSetReturnImpl.java:211)\n\tat org.hibernate.id.IdentityGenerator$GetGeneratedKeysDelegate.executeAndExtract(IdentityGenerator.java:96)\n\tat org.hibernate.id.insert.AbstractReturningDelegate.performInsert(AbstractReturningDelegate.java:58)\n\tat org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:3032)\n\tat org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:3558)\n\tat org.hibernate.action.internal.EntityIdentityInsertAction.execute(EntityIdentityInsertAction.java:98)\n\tat org.hibernate.engine.spi.ActionQueue.execute(ActionQueue.java:492)\n\tat org.hibernate.engine.spi.ActionQueue.addResolvedEntityInsertAction(ActionQueue.java:197)\n\tat org.hibernate.engine.spi.ActionQueue.addInsertAction(ActionQueue.java:181)\n\tat org.hibernate.engine.spi.ActionQueue.addAction(ActionQueue.java:216)\n\tat org.hibernate.event.internal.AbstractSaveEventListener.addInsertAction(AbstractSaveEventListener.java:334)\n\tat org.hibernate.event.internal.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:289)\n\tat org.hibernate.event.internal.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:195)\n\tat org.hibernate.event.internal.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:126)\n\tat org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:209)\n\tat org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:194)\n\tat org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.performSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:114)\n\tat org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:90)\n\tat org.hibernate.internal.SessionImpl.fireSaveOrUpdate(SessionImpl.java:684)\n\tat org.hibernate.internal.SessionImpl.saveOrUpdate(SessionImpl.java:676)\n\tat org.hibernate.engine.spi.CascadingActions$5.cascade(CascadingActions.java:235)\n\tat org.hibernate.engine.internal.Cascade.cascadeToOne(Cascade.java:350)\n\tat org.hibernate.engine.internal.Cascade.cascadeAssociation(Cascade.java:293)\n\tat org.hibernate.engine.internal.Cascade.cascadeProperty(Cascade.java:161)\n\tat org.hibernate.engine.internal.Cascade.cascadeCollectionElements(Cascade.java:379)\n\tat org.hibernate.engine.internal.Cascade.cascadeCollection(Cascade.java:319)\n\tat org.hibernate.engine.internal.Cascade.cascadeAssociation(Cascade.java:296)\n\tat org.hibernate.engine.internal.Cascade.cascadeProperty(Cascade.java:161)\n\tat org.hibernate.engine.internal.Cascade.cascade(Cascade.java:118)\n\tat org.hibernate.event.internal.AbstractSaveEventListener.cascadeAfterSave(AbstractSaveEventListener.java:470)\n\tat org.hibernate.event.internal.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:295)\n\tat org.hibernate.event.internal.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:195)\n\tat org.hibernate.event.internal.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:126)\n\tat org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:209)\n\tat org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:194)\n\tat org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.performSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:114)\n\tat org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:90)\n\tat org.hibernate.internal.SessionImpl.fireSaveOrUpdate(SessionImpl.java:684)\n\tat org.hibernate.internal.SessionImpl.saveOrUpdate(SessionImpl.java:676)\n\tat org.hibernate.internal.SessionImpl.saveOrUpdate(SessionImpl.java:671)\n\tat org.openmrs.api.db.hibernate.HibernateEncounterDAO.saveEncounter(HibernateEncounterDAO.java:77)\n\tat org.openmrs.api.impl.EncounterServiceImpl.saveEncounter(EncounterServiceImpl.java:187)\n\tat sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)\n\tat sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)\n\tat sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)\n\tat java.lang.reflect.Method.invoke(Method.java:498)\n\tat org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:317)\n\tat org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:190)\n\tat org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)\n\tat org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:99)\n\tat org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:281)\n\tat org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96)\n\tat org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)\n\tat org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:207)\n\tat com.sun.proxy.$Proxy186.saveEncounter(Unknown Source)\n\tat sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)\n\tat sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)\n\tat sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)\n\tat java.lang.reflect.Method.invoke(Method.java:498)\n\tat org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:317)\n\tat org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:190)\n\tat org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)\n\tat org.openmrs.aop.LoggingAdvice.invoke(LoggingAdvice.java:121)\n\tat org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)\n\tat org.springframework.aop.framework.adapter.MethodBeforeAdviceInterceptor.invoke(MethodBeforeAdviceInterceptor.java:52)\n\tat org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)\n\tat org.springframework.aop.framework.adapter.MethodBeforeAdviceInterceptor.invoke(MethodBeforeAdviceInterceptor.java:52)\n\tat org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)\n\tat org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:207)\n\tat com.sun.proxy.$Proxy187.saveEncounter(Unknown Source)\n\tat org.openmrs.module.webservices.rest.web.v1_0.resource.openmrs1_9.EncounterResource1_9.save(EncounterResource1_9.java:81)\n\tat org.openmrs.module.webservices.rest.web.v1_0.resource.openmrs1_9.EncounterResource1_9.save(EncounterResource1_9.java:31)\n\tat org.openmrs.module.webservices.rest.web.resource.impl.DelegatingCrudResource.create(DelegatingCrudResource.java:78)\n\tat org.openmrs.module.webservices.rest.web.v1_0.controller.MainResourceController.create(MainResourceController.java:92)\n\tat sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)\n\tat sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)\n\tat sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)\n\tat java.lang.reflect.Method.invoke(Method.java:498)\n\tat org.springframework.web.bind.annotation.support.HandlerMethodInvoker.invokeHandlerMethod(HandlerMethodInvoker.java:177)\n\tat org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:446)\n\tat org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:434)\n\tat org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:943)\n\tat org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:877)\n\tat org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:966)\n\tat org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:868)\n\tat javax.servlet.http.HttpServlet.service(HttpServlet.java:650)\n\tat org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:842)\n\tat javax.servlet.http.HttpServlet.service(HttpServlet.java:731)\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)\n\tat org.openmrs.module.web.filter.ForcePasswordChangeFilter.doFilter(ForcePasswordChangeFilter.java:60)\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)\n\tat org.openmrs.module.web.filter.ModuleFilterChain.doFilter(ModuleFilterChain.java:72)\n\tat org.openmrs.web.filter.GZIPFilter.doFilterInternal(GZIPFilter.java:64)\n\tat org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)\n\tat org.openmrs.module.web.filter.ModuleFilterChain.doFilter(ModuleFilterChain.java:70)\n\tat org.openmrs.module.webservices.rest.web.filter.AuthorizationFilter.doFilter(AuthorizationFilter.java:104)\n\tat org.openmrs.module.web.filter.ModuleFilterChain.doFilter(ModuleFilterChain.java:70)\n\tat org.springframework.web.filter.ShallowEtagHeaderFilter.doFilterInternal(ShallowEtagHeaderFilter.java:82)\n\tat org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)\n\tat org.openmrs.module.web.filter.ModuleFilterChain.doFilter(ModuleFilterChain.java:70)\n\tat org.openmrs.module.owa.filter.OwaFilter.doFilter(OwaFilter.java:57)\n\tat org.openmrs.module.web.filter.ModuleFilterChain.doFilter(ModuleFilterChain.java:70)\n\tat org.openmrs.module.xforms.web.XformsFilter.doFilter(XformsFilter.java:69)\n\tat org.openmrs.module.web.filter.ModuleFilterChain.doFilter(ModuleFilterChain.java:70)\n\tat org.openmrs.module.web.filter.ModuleFilter.doFilter(ModuleFilter.java:54)\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)\n\tat org.openmrs.web.filter.OpenmrsFilter.doFilterInternal(OpenmrsFilter.java:108)\n\tat org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)\n\tat org.springframework.orm.hibernate4.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:150)\n\tat org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)\n\tat org.openmrs.web.filter.StartupFilter.doFilter(StartupFilter.java:105)\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)\n\tat org.openmrs.web.filter.StartupFilter.doFilter(StartupFilter.java:105)\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)\n\tat org.openmrs.web.filter.StartupFilter.doFilter(StartupFilter.java:105)\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)\n\tat org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)\n\tat org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)\n\tat org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)\n\tat org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)\n\tat org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:505)\n\tat org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:169)\n\tat org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)\n\tat org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)\n\tat org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:423)\n\tat org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1079)\n\tat org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:625)\n\tat org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:316)\n\tat java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)\n\tat java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)\n\tat org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)\n\tat java.lang.Thread.run(Thread.java:748)\nCaused by: com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException: Column 'provider_id' cannot be null\n\tat sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)\n\tat sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)\n\tat sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)\n\tat java.lang.reflect.Constructor.newInstance(Constructor.java:423)\n\tat com.mysql.jdbc.Util.handleNewInstance(Util.java:411)\n\tat com.mysql.jdbc.Util.getInstance(Util.java:386)\n\tat com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1041)\n\tat com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4237)\n\tat com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4169)\n\tat com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2617)\n\tat com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2778)\n\tat com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2825)\n\tat com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:2156)\n\tat com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2441)\n\tat com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2366)\n\tat com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2350)\n\tat com.mchange.v2.c3p0.impl.NewProxyPreparedStatement.executeUpdate(NewProxyPreparedStatement.java:147)\n\tat org.hibernate.engine.jdbc.internal.ResultSetReturnImpl.executeUpdate(ResultSetReturnImpl.java:208)\n\t... 143 more\n"