ERROR: column "_F1.source" must appear in the GROUP BY clause or be used in an aggregate function Position: 32

             javax.servlet.ServletException: On requestURL: http://localhost:8080/nuxeo/view_documents.faces
	at org.nuxeo.ecm.platform.ui.web.rest.FancyURLFilter.doFilter(FancyURLFilter.java:145)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
	at org.nuxeo.ecm.platform.wi.filter.WIRequestFilter.doFilter(WIRequestFilter.java:114)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
	at org.nuxeo.ecm.platform.web.common.requestcontroller.filter.NuxeoRequestControllerFilter.doFilter(NuxeoRequestControllerFilter.java:145)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
	at org.nuxeo.ecm.platform.ui.web.auth.NuxeoAuthenticationFilter.doFilterInternal(NuxeoAuthenticationFilter.java:614)
	at org.nuxeo.ecm.platform.ui.web.auth.service.NuxeoAuthFilterChain.doFilter(NuxeoAuthFilterChain.java:35)
	at org.nuxeo.ecm.platform.ui.web.auth.oauth.NuxeoOAuthFilter.doFilter(NuxeoOAuthFilter.java:119)
	at org.nuxeo.ecm.platform.ui.web.auth.service.NuxeoAuthFilterChain.doFilter(NuxeoAuthFilterChain.java:33)
	at org.nuxeo.ecm.platform.ui.web.auth.NuxeoAuthenticationFilter.doFilter(NuxeoAuthenticationFilter.java:410)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
	at org.nuxeo.ecm.platform.web.common.requestcontroller.filter.NuxeoCorsFilter.doFilter(NuxeoCorsFilter.java:51)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
	at org.nuxeo.ecm.platform.web.common.exceptionhandling.NuxeoExceptionFilter.doFilter(NuxeoExceptionFilter.java:79)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
	at org.nuxeo.ecm.platform.web.common.encoding.NuxeoEncodingFilter.doFilter(NuxeoEncodingFilter.java:69)
	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:222)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
	at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1023)
	at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
	at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:744)
Caused by: javax.servlet.ServletException: exception invoking: getPopularCloudOnAllDocuments
	at javax.faces.webapp.FacesServlet.service(FacesServlet.java:277)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
	at org.nuxeo.wss.servlet.BaseWSSFilter.doFilter(BaseWSSFilter.java:137)
	at org.nuxeo.wss.servlet.FailSafeWSSFilter.doFilter(FailSafeWSSFilter.java:55)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
	at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:83)
	at org.nuxeo.ecm.platform.ui.web.multipart.MultipartFilter.doFilter(MultipartFilter.java:73)
	at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
	at org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:64)
	at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
	at org.jboss.seam.web.RedirectFilter.doFilter(RedirectFilter.java:45)
	at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
	at org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:178)
	at org.ajax4jsf.webapp.BaseFilter.handleRequest(BaseFilter.java:290)
	at org.ajax4jsf.webapp.BaseFilter.processUploadsAndHandleRequest(BaseFilter.java:368)
	at org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:495)
	at org.jboss.seam.web.Ajax4jsfFilter.doFilter(Ajax4jsfFilter.java:56)
	at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
	at org.jboss.seam.servlet.SeamFilter.doFilter(SeamFilter.java:158)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
	at org.nuxeo.ecm.core.management.jtajca.internal.Log4jWebFilter.doFilter(Log4jWebFilter.java:64)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
	at org.nuxeo.ecm.platform.ui.web.rest.FancyURLFilter.doFilter(FancyURLFilter.java:129)
	... 37 more
Caused by: java.lang.RuntimeException: exception invoking: getPopularCloudOnAllDocuments
	at org.jboss.seam.util.Reflections.invokeAndWrap(Reflections.java:148)
	at org.jboss.seam.Component.callComponentMethod(Component.java:2216)
	at org.jboss.seam.Component.getInstanceFromFactory(Component.java:2048)
	at org.jboss.seam.Component.getInstance(Component.java:1978)
	at org.jboss.seam.Component.getInstance(Component.java:1950)
	at org.jboss.seam.Component.getInstance(Component.java:1944)
	at org.jboss.seam.Namespace.getComponentInstance(Namespace.java:55)
	at org.jboss.seam.Namespace.getComponentInstance(Namespace.java:50)
	at org.jboss.seam.el.SeamELResolver.resolveBase(SeamELResolver.java:166)
	at org.jboss.seam.el.SeamELResolver.getValue(SeamELResolver.java:53)
	at javax.el.CompositeELResolver.getValue(CompositeELResolver.java:67)
	at com.sun.faces.el.FacesCompositeELResolver.getValue(FacesCompositeELResolver.java:72)
	at org.jboss.el.parser.AstIdentifier.getValue(AstIdentifier.java:44)
	at org.jboss.el.parser.AstEmpty.getValue(AstEmpty.java:29)
	at org.jboss.el.parser.AstNot.getValue(AstNot.java:26)
	at org.jboss.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:186)
	at com.sun.facelets.el.TagValueExpression.getValue(TagValueExpression.java:71)
	at javax.faces.component.UIComponentBase.isRendered(UIComponentBase.java:390)
	at javax.faces.component.UIComponent.encodeAll(UIComponent.java:924)
	at javax.faces.render.Renderer.encodeChildren(Renderer.java:148)
	at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:837)
	at org.ajax4jsf.renderkit.RendererBase.renderChild(RendererBase.java:277)
	at org.ajax4jsf.renderkit.RendererBase.renderChildren(RendererBase.java:258)
	at org.ajax4jsf.renderkit.html.AjaxOutputPanelRenderer.encodeChildren(AjaxOutputPanelRenderer.java:78)
	at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:837)
	at org.ajax4jsf.renderkit.RendererBase.renderChild(RendererBase.java:277)
	at org.ajax4jsf.renderkit.AjaxChildrenRenderer.encodeAjaxComponent(AjaxChildrenRenderer.java:166)
	at org.ajax4jsf.renderkit.AjaxChildrenRenderer.encodeAjaxChildren(AjaxChildrenRenderer.java:83)
	at org.ajax4jsf.renderkit.AjaxChildrenRenderer.encodeAjaxComponent(AjaxChildrenRenderer.java:157)
	at org.ajax4jsf.renderkit.AjaxContainerRenderer.encodeAjax(AjaxContainerRenderer.java:123)
	at org.ajax4jsf.component.UIAjaxRegion.encodeAjax(UIAjaxRegion.java:263)
	at org.ajax4jsf.component.AjaxViewRoot$4.invokeContextCallback(AjaxViewRoot.java:489)
	at javax.faces.component.UIComponent.invokeOnComponent(UIComponent.java:711)
	at javax.faces.component.UIComponentBase.invokeOnComponent(UIComponentBase.java:675)
	at javax.faces.component.UIComponent.invokeOnComponent(UIComponent.java:720)
	at javax.faces.component.UIComponentBase.invokeOnComponent(UIComponentBase.java:675)
	at org.ajax4jsf.component.AjaxViewRoot.encodeChildren(AjaxViewRoot.java:543)
	at javax.faces.component.UIComponent.encodeAll(UIComponent.java:930)
	at com.sun.facelets.FaceletViewHandler.renderView(FaceletViewHandler.java:592)
	at org.ajax4jsf.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:100)
	at org.ajax4jsf.application.AjaxViewHandler.renderView(AjaxViewHandler.java:176)
	at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:110)
	at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:100)
	at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:139)
	at org.nuxeo.ecm.platform.ui.web.lifecycle.NuxeoLifeCycleImpl.render(NuxeoLifeCycleImpl.java:98)
	at javax.faces.webapp.FacesServlet.service(FacesServlet.java:266)
	... 63 more
Caused by: org.nuxeo.ecm.core.api.ClientException: Failed to execute query: NXTAG: COUNTSOURCE: SELECT tag:label, relation:source FROM Tagging: ERROR: column "_F1.source" must appear in the GROUP BY clause or be used in an aggregate function
  Position: 32
	at org.nuxeo.ecm.core.api.AbstractSession.queryAndFetch(AbstractSession.java:1677)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:606)
	at org.nuxeo.ecm.core.api.TransactionalCoreSessionWrapper.invoke(TransactionalCoreSessionWrapper.java:136)
	at com.sun.proxy.$Proxy101.queryAndFetch(Unknown Source)
	at org.nuxeo.ecm.platform.tag.TagServiceImpl$UnrestrictedGetDocumentCloud.run(TagServiceImpl.java:531)
	at org.nuxeo.ecm.core.api.UnrestrictedSessionRunner.runUnrestricted(UnrestrictedSessionRunner.java:115)
	at org.nuxeo.ecm.platform.tag.TagServiceImpl.getTagCloud(TagServiceImpl.java:471)
	at org.nuxeo.ecm.platform.tag.web.TagActionsBean.getPopularCloudOnAllDocuments(TagActionsBean.java:228)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:606)
	at org.jboss.seam.util.Reflections.invoke(Reflections.java:22)
	at org.jboss.seam.intercept.RootInvocationContext.proceed(RootInvocationContext.java:31)
	at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:56)
	at org.jboss.seam.transaction.RollbackInterceptor.aroundInvoke(RollbackInterceptor.java:28)
	at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
	at org.jboss.seam.core.BijectionInterceptor.aroundInvoke(BijectionInterceptor.java:68)
	at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
	at org.nuxeo.ecm.platform.ui.web.util.NuxeoExceptionInterceptor.aroundInvoke(NuxeoExceptionInterceptor.java:79)
	at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
	at org.jboss.seam.core.MethodContextInterceptor.aroundInvoke(MethodContextInterceptor.java:44)
	at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
	at org.jboss.seam.intercept.RootInterceptor.invoke(RootInterceptor.java:107)
	at org.jboss.seam.intercept.JavaBeanInterceptor.interceptInvocation(JavaBeanInterceptor.java:166)
	at org.jboss.seam.intercept.JavaBeanInterceptor.invoke(JavaBeanInterceptor.java:102)
	at org.nuxeo.ecm.platform.tag.web.TagActionsBean_$$_javassist_66.getPopularCloudOnAllDocuments(TagActionsBean_$$_javassist_66.java)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:606)
	at org.jboss.seam.util.Reflections.invoke(Reflections.java:22)
	at org.jboss.seam.util.Reflections.invokeAndWrap(Reflections.java:138)
	... 108 more
Caused by: org.nuxeo.ecm.core.query.QueryException: Invalid query: NXTAG: COUNTSOURCE: SELECT tag:label, relation:source FROM Tagging
	at org.nuxeo.ecm.core.storage.sql.coremodel.SQLSession$SQLSessionQuery.executeAndFetch(SQLSession.java:626)
	at org.nuxeo.ecm.core.storage.sql.coremodel.SQLSession.queryAndFetch(SQLSession.java:540)
	at org.nuxeo.ecm.core.api.AbstractSession.queryAndFetch(AbstractSession.java:1672)
	... 143 more
Caused by: org.nuxeo.ecm.core.storage.StorageException: Invalid query: NXTAG: COUNTSOURCE: SELECT tag:label, relation:source FROM Tagging
	at org.nuxeo.ecm.core.storage.sql.jdbc.JDBCMapper.queryAndFetch(JDBCMapper.java:921)
	at org.nuxeo.ecm.core.storage.sql.SoftRefCachingMapper.queryAndFetch(SoftRefCachingMapper.java:107)
	at org.nuxeo.ecm.core.storage.sql.SessionImpl.queryAndFetch(SessionImpl.java:1263)
	at org.nuxeo.ecm.core.storage.sql.ra.ConnectionImpl.queryAndFetch(ConnectionImpl.java:374)
	at org.nuxeo.ecm.core.storage.sql.coremodel.SQLSession$SQLSessionQuery.executeAndFetch(SQLSession.java:623)
	... 145 more
Caused by: org.postgresql.util.PSQLException: ERROR: column "_F1.source" must appear in the GROUP BY clause or be used in an aggregate function
  Position: 32
	at org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorImpl.java:2161)
	at org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:1890)
	at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:255)
	at org.postgresql.jdbc2.AbstractJdbc2Statement.execute(AbstractJdbc2Statement.java:559)
	at org.postgresql.jdbc2.AbstractJdbc2Statement.executeWithFlags(AbstractJdbc2Statement.java:417)
	at org.postgresql.jdbc2.AbstractJdbc2Statement.executeQuery(AbstractJdbc2Statement.java:302)
	at org.apache.tomcat.dbcp.dbcp.DelegatingPreparedStatement.executeQuery(DelegatingPreparedStatement.java:96)
	at org.apache.tomcat.dbcp.dbcp.DelegatingPreparedStatement.executeQuery(DelegatingPreparedStatement.java:96)
	at org.nuxeo.ecm.core.storage.sql.jdbc.ResultSetQueryResult.(ResultSetQueryResult.java:74)
	at org.nuxeo.ecm.core.storage.sql.jdbc.JDBCMapper.queryAndFetch(JDBCMapper.java:917)
	... 149 mor