On duplicate clientID, it throws DuplicateKeyException!

If user enters duplicate clientID, it shows message,"There was a problem.."

Please see attached screenshot.

Snippet of tomcat log:

----------------------------
ID: 12
Address: http://localhost:9933/aml-oauth-provider/rest/client-management/testing05
Encoding: UTF-8
Http-Method: PUT
Content-Type: application/json; charset=UTF-8
Headers:

{Accept=[application/json, text/javascript, */*; q=0.01], accept-encoding=[gzip, deflate], accept-language=[en-US,en;q=0.5], connection=[Keep-Alive], Content-Length=[87], content-type=[application/json; charset=UTF-8], cookie=[JSESSIONID=E1008D06C07C11F16FE602482AEB1B5C], host=[localhost:9933], referer=[http://localhost:9933/aml-oauth-provider/], user-agent=[Mozilla/5.0 (Windows NT 6.3; WOW64; rv:43.0) Gecko/20100101 Firefox/43.0], x-csrf-token=[a114739f-f380-4c23-afc5-30e7eedd5408], x-forwarded-host=[localhost:9933], x-forwarded-server=[2001:4800:7811:513:dd9d:596:ff04:a1a7], x-requested-with=[XMLHttpRequest]}

Payload:

{"clientId":"testing05","clientSecret":"","scopes":["read","write"],"refreshTokens":[]}

--------------------------------------
2016-01-11 11:47:41 WARN org.apache.cxf.phase.PhaseInterceptorChain:452 - tsa.amlproduct.qa@gmail.com REALM_qa2, ROLE_USER - Application

{http://cxf.services.provider.oauth2.admaxlocal.com/}

UserService has thrown exception, unwinding now
org.apache.cxf.interceptor.Fault: PreparedStatementCallback; SQL [INSERT INTO oauth_client_details VALUES (?,'aml-external-api',?,?,'password,refresh_token',NULL,?,3600,200000000,NULL,NULL)]; Duplicate entry 'qa2-testing05' for key 'PRIMARY'; nested exception is com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException: Duplicate entry 'qa2-testing05' for key 'PRIMARY'
at org.apache.cxf.service.invoker.AbstractInvoker.createFault(AbstractInvoker.java:163)
at org.apache.cxf.service.invoker.AbstractInvoker.invoke(AbstractInvoker.java:129)
at org.apache.cxf.jaxrs.JAXRSInvoker.invoke(JAXRSInvoker.java:200)
at org.apache.cxf.jaxrs.JAXRSInvoker.invoke(JAXRSInvoker.java:99)
at org.apache.cxf.interceptor.ServiceInvokerInterceptor$1.run(ServiceInvokerInterceptor.java:59)
at org.apache.cxf.interceptor.ServiceInvokerInterceptor.handleMessage(ServiceInvokerInterceptor.java:96)
at org.apache.cxf.phase.PhaseInterceptorChain.doIntercept(PhaseInterceptorChain.java:307)
at org.apache.cxf.transport.ChainInitiationObserver.onMessage(ChainInitiationObserver.java:121)
at org.apache.cxf.transport.http.AbstractHTTPDestination.invoke(AbstractHTTPDestination.java:251)
at org.apache.cxf.transport.servlet.ServletController.invokeDestination(ServletController.java:234)
at org.apache.cxf.transport.servlet.ServletController.invoke(ServletController.java:208)
at org.apache.cxf.transport.servlet.ServletController.invoke(ServletController.java:160)
at org.apache.cxf.transport.servlet.CXFNonSpringServlet.invoke(CXFNonSpringServlet.java:171)
at org.apache.cxf.transport.servlet.AbstractHTTPServlet.handleRequest(AbstractHTTPServlet.java:293)
at org.apache.cxf.transport.servlet.AbstractHTTPServlet.doPut(AbstractHTTPServlet.java:229)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:650)
at org.apache.cxf.transport.servlet.AbstractHTTPServlet.service(AbstractHTTPServlet.java:268)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at com.admaxlocal.oauth2.provider.LoggingContextFilter.doFilter(LoggingContextFilter.java:50)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330)
at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:118)
at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:84)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:113)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:103)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:113)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:154)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
.
.
..
aused by: org.springframework.dao.DuplicateKeyException: PreparedStatementCallback; SQL [INSERT INTO oauth_client_details VALUES (?,'aml-external-api',?,?,'password,refresh_token',NULL,?,3600,200000000,NULL,NULL)]; Duplicate entry 'qa2-testing05' for key 'PRIMARY'; nested exception is com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException: Duplicate entry 'qa2-testing05' for key 'PRIMARY'
at org.springframework.jdbc.support.SQLErrorCodeSQLExceptionTranslator.doTranslate(SQLErrorCodeSQLExceptionTranslator.java:239)
at org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:73)
at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:660)
at org.springframework.jdbc.core.JdbcTemplate.update(JdbcTemplate.java:909)
at org.springframework.jdbc.core.JdbcTemplate.update(JdbcTemplate.java:970)
at org.springframework.jdbc.core.JdbcTemplate.update(JdbcTemplate.java:980)
at com.admaxlocal.oauth2.provider.dao.ClientIdDao.createClientId(ClientIdDao.java:27)
at com.admaxlocal.oauth2.provider.services.cxf.ClientIdService.createClientId(ClientIdService.java:99)
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:616)
at org.apache.cxf.service.invoker.AbstractInvoker.performInvocation(AbstractInvoker.java:181)
at org.apache.cxf.service.invoker.AbstractInvoker.invoke(AbstractInvoker.java:97)
... 72 more
Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException: Duplicate entry 'qa2-testing05' for key 'PRIMARY'
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:532)

Tomcat log attached.

Expected Result:

UI should show message , " Duplicate client ID ***"