Dears

I'd like to change apikey via ADMIN REST API on 1.5.1.Final environment
However, exception happens with message below:

{"type":"SystemErrorException","errorCode":-1,"message":"java.lang.NullPointerException","moreInfoUrl":null,"stacktrace":"io.apiman.manager.api.rest.contract.exceptions.SystemErrorException: java.lang.NullPointerException\n\tatio.apiman.manager.api.rest.impl.OrganizationResourceImpl.updateClientApiKey(OrganizationResourceImpl.java:776)\n\tat io.apiman.manager.api.rest.impl.OrganizationResourceImpl$Proxy$_$$_WeldClientProxy.updateClientApiKey(Unknown Source)\n\tat sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)\n\tat sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)\n\tat sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)\n\tat java.lang.reflect.Method.invoke(Method.java:498)\n\tat org.jboss.resteasy.core.MethodInjectorImpl.invoke(MethodInjectorImpl.java:140)\n\tat org.jboss.resteasy.core.ResourceMethodInvoker.invokeOnTarget(ResourceMethodInvoker.java:295)\n\tat org.jboss.resteasy.core.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:249)\n\tat org.jboss.resteasy.core.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:236)\n\tat org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:406)\n\tat org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:213)\n\tat org.jboss.resteasy.plugins.server.servlet.ServletContainerDispatcher.service(ServletContainerDispatcher.java:228)\n\tat org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:56)\n\tat org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:51)\n\tat javax.servlet.http.HttpServlet.service(HttpServlet.java:790)\n\tat io.undertow.servlet.handlers.ServletHandler.handleRequest(ServletHandler.java:85)\n\tat io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:129)\n\tat io.apiman.common.servlet.RootResourceFilter.doFilter(RootResourceFilter.java:59)\n\tat io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:61)\n\tat io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131)\n\tat io.apiman.manager.api.war.TransactionWatchdogFilter.doFilter(TransactionWatchdogFilter.java:57)\n\tat io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:61)\n\tat io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131)\n\tat io.apiman.manager.api.security.impl.DefaultSecurityContextFilter.doFilter(DefaultSecurityContextFilter.java:56)\n\tat io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:61)\n\tat io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131)\n\tat io.apiman.common.servlet.DisableCachingFilter.doFilter(DisableCachingFilter.java:52)\n\tat io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:61)\n\tat io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131)\n\tat io.apiman.common.servlet.ApimanCorsFilter.doFilter(ApimanCorsFilter.java:71)\n\tat io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:61)\n\tat io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131)\n\tat io.apiman.common.servlet.LocaleFilter.doFilter(LocaleFilter.java:61)\n\tat io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:61)\n\tat io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131)\n\tat io.undertow.servlet.handlers.FilterHandler.handleRequest(FilterHandler.java:84)\n\tat io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:62)\n\tat io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36)\n\tat org.wildfly.extension.undertow.security.SecurityContextAssociationHandler.handleRequest(SecurityContextAssociationHandler.java:78)\n\tat io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)\n\tat org.keycloak.adapters.undertow.UndertowAuthenticatedActionsHandler.handleRequest(UndertowAuthenticatedActionsHandler.java:66)\n\tat io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest(SSLInformationAssociationHandler.java:131)\n\tat io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:57)\n\tat io.undertow.server.handlers.DisableCacheHandler.handleRequest(DisableCacheHandler.java:33)\n\tat io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)\n\tat io.undertow.security.handlers.AuthenticationConstraintHandler.handleRequest(AuthenticationConstraintHandler.java:53)\n\tat io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:46)\n\tat io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:64)\n\tat io.undertow.servlet.handlers.security.ServletSecurityConstraintHandler.handleRequest(ServletSecurityConstraintHandler.java:59)\n\tat io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:60)\n\tat io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:77)\n\tat io.undertow.security.handlers.NotificationReceiverHandler.handleRequest(NotificationReceiverHandler.java:50)\n\tat io.undertow.security.handlers.AbstractSecurityContextAssociationHandler.handleRequest(AbstractSecurityContextAssociationHandler.java:43)\n\tat io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)\n\tat org.wildfly.extension.undertow.security.jacc.JACCContextIdHandler.handleRequest(JACCContextIdHandler.java:61)\n\tat io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)\n\tat org.wildfly.extension.undertow.deployment.GlobalRequestControllerHandler.handleRequest(GlobalRequestControllerHandler.java:68)\n\tat org.keycloak.adapters.undertow.ServletPreAuthActionsHandler.handleRequest(ServletPreAuthActionsHandler.java:69)\n\tat io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)\n\tat io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:292)\n\tat io.undertow.servlet.handlers.ServletInitialHandler.access$100(ServletInitialHandler.java:81)\n\tat io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:138)\n\tat io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:135)\n\tat io.undertow.servlet.core.ServletRequestContextThreadSetupAction$1.call(ServletRequestContextThreadSetupAction.java:48)\n\tat io.undertow.servlet.core.ContextClassLoaderSetupAction$1.call(ContextClassLoaderSetupAction.java:43)\n\tat org.wildfly.extension.undertow.security.SecurityContextThreadSetupAction.lambda$create$0(SecurityContextThreadSetupAction.java:105)\n\tat org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1508)\n\tat org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1508)\n\tat org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1508)\n\tat org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1508)\n\tat org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1508)\n\tat io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:272)\n\tat io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:81)\n\tat io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.ja* Connection #0to host apimgr left intact
va:104)\n\tat io.undertow.server.Connectors.executeRootHandler(Connectors.java:326)\n\tat io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:812)\n\tat java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)\n\tat java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)\n\tat java.lang.Thread.run(Thread.java:748)\nCaused by: java.lang.NullPointerException\n\tat io.apiman.manager.api.rest.impl.OrganizationResourceImpl.updateClientApiKey(OrganizationResourceImpl.java:756)\n\t... 79 more\n"}

The docs describes as this call will fail (the API Key can only be modified if the client is not currently registered
I tried both when Client App status is Created or RETIRED (after un-register)
exception still happens
Does anybody has same issue?

Thanks