Melati Error Template

An error has occured in the application that runs this website. Please contact Gomer Webmaster, with the information given below.

org.melati.util.CacheDuplicationException
	at org.melati.util.Cache.put(Cache.java:302)
	at org.melati.poem.Table.getObject(Table.java:900)
	at org.melati.poem.Table$8.mapped(Table.java:1110)
	at org.melati.util.MappedEnumeration.nextElement(MappedEnumeration.java:64)
	at uk.co.gomer.melati.books.Book.getBriefDescription(Unknown Source)
	at uk.co.gomer.beans.BookBeanView.(Unknown Source)
	at uk.co.gomer.beans.BookBeanView.(Unknown Source)
	at uk.co.gomer.servlets.SearchBook2.searchByAuthor(SearchBook2.java:684)
	at uk.co.gomer.servlets.SearchBook2.doAuthorRequest(SearchBook2.java:310)
	at uk.co.gomer.servlets.SearchBook2.doTemplateRequest(SearchBook2.java:173)
	at org.melati.servlet.TemplateServlet.doPoemRequest(TemplateServlet.java:128)
	at org.melati.servlet.PoemServlet$1.run(PoemServlet.java:261)
	at org.melati.poem.Database$2.run(Database.java:531)
	at org.melati.poem.PoemThread.inSession(PoemThread.java:125)
	at org.melati.poem.Database.perform(Database.java:528)
	at org.melati.poem.Database.inSession(Database.java:598)
	at org.melati.servlet.PoemServlet.doConfiguredRequest(PoemServlet.java:254)
	at org.melati.servlet.ConfigServlet.doGetPostRequest(ConfigServlet.java:167)
	at org.melati.servlet.ConfigServlet.doGet(ConfigServlet.java:143)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
	at org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:199)
	at org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:282)
	at org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:744)
	at org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java:674)
	at org.apache.jk.common.ChannelSocket$SocketConnection.runIt(ChannelSocket.java:866)
	at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
	at java.lang.Thread.run(Thread.java:534)