我想通过 My dsapce -> New user 创建一个用户。我收到完成注册的电子邮件。但是当我填写表格时，得到“内部系统错误”。环境：DSpace 版本：5.0-rc4-SNAPSHOT，tomcat7，Postgresql 9.3 java 版本“1.7.0_65”，操作系统：Linux(amd64) 版本 3.13.0-32-generic
这是 dspace/log/dspace.log 中的错误日志：
2015-01-01 21:54:48,220 INFO org.dspace.browse.BrowseEngine @ xxx@yahoo.com:session_id=6D06ED6F708F84A7BFFB443D5FEA2D1F:ip_addr=192.168.2.150:browse_mini:
2015-01-01 21:54:48,242 INFO org.dspace.app.webui.discovery.DiscoverUtility @ facets for scope, null: 3
2015-01-01 21:54:52,149 INFO org.dspace.app.webui.servlet.EditProfileServlet @ xxx@yahoo.com:session_id=6D06ED6F708F84A7BFFB443D5FEA2D1F:ip_addr=192.168.2.150:view_profile:
2015-01-01 21:55:14,082 INFO org.dspace.app.webui.servlet.EditProfileServlet @ xxx@yahoo.com:session_id=6D06ED6F708F84A7BFFB443D5FEA2D1F:ip_addr=192.168.2.150:edit_profile:password_changed=true
2015-01-01 21:55:14,082 INFO org.dspace.eperson.EPerson @ xxx@yahoo.com:session_id=6D06ED6F708F84A7BFFB443D5FEA2D1F:ip_addr=192.168.2.150:update_eperson:eperson_id=1
2015-01-01 21:55:14,092 WARN org.dspace.content.DSpaceObject @ Invalid metadata field: [eperson.lastname] : [aaa]
2015-01-01 21:55:14,092 WARN org.dspace.app.webui.servlet.DSpaceServlet @ xxx@yahoo.com:session_id=6D06ED6F708F84A7BFFB443D5FEA2D1F:ip_addr=192.168.2.150:database_error:java.sql.SQLException\colon; Invalid metadata field\colon; [eperson.lastname]
java.sql.SQLException: Invalid metadata field: [eperson.lastname]
at org.dspace.content.DSpaceObject.updateMetadata(DSpaceObject.java:122)
at org.dspace.eperson.EPerson.update(EPerson.java:1056)
at org.dspace.app.webui.servlet.EditProfileServlet.doDSPost(EditProfileServlet.java:88)
at org.dspace.app.webui.servlet.DSpaceServlet.processRequest(DSpaceServlet.java:115)
at org.dspace.app.webui.servlet.DSpaceServlet.doPost(DSpaceServlet.java:73)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:646)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.dspace.app.webui.filter.RegisteredOnlyFilter.doFilter(RegisteredOnlyFilter.java:66)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.dspace.utils.servlet.DSpaceWebappServletFilter.doFilter(DSpaceWebappServletFilter.java:78)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:501)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1040)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:607)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:313)
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:745)