netscape.ldap.LDAPException: error result (68); Already exists

at netscape.ldap.LDAPConnection.checkMsg(LDAPConnection.java, Compiled Code)

at netscape.ldap.LDAPConnection.add(LDAPConnection.java, Compiled Code)

at netscape.ldap.LDAPConnection.add(LDAPConnection.java:2848)

at netscape.ldap.LDAPConnection.add(LDAPConnection.java:2798)

at _ldap._ldapadd._jspService(_ldapadd.java:168)

at oracle.jsp.runtime.HttpJsp.service(HttpJsp.java, Compiled Code)

at oracle.jsp.app.JspApplication.dispatchRequest(JspApplication.java, Compiled Code)

at oracle.jsp.JspServlet.doDispatch(JspServlet.java, Compiled Code)

at oracle.jsp.JspServlet.internalService(JspServlet.java, Compiled Code)

at oracle.jsp.JspServlet.service(JspServlet.java, Compiled Code)

at javax.servlet.http.HttpServlet.service(HttpServlet.java, Compiled Code)

at org.apache.jserv.JServConnection.processRequest(JServConnection.java, Compiled Code)

at org.apache.jserv.JServConnection.run(JServConnection.java, Compiled Code)

at java.lang.Thread.run(Thread.java, Compiled Code)

왜 이런 에러가 나오는 걸까요???

아무리 해봐두 안되는데, 좀 도와 주세요??

감사합니다