change composite type, get error on ui

Error: Expected a ':' after a key at character 7 of {"list":[

{"timestamp":1455216205366,"uuid":"c83ddd154675459bbd95ed1bf084ee4f"}

,

{"timestamp":1455216205195,"uuid":"55b7f1fa2e4b4681bec6672a27f8f6f6"}

,

{"timestamp":1455216205026,"uuid":"902f390b8bb140dcb457d73e93629bd8"}

]}, Problem calling method groupEditCompositeSubmit on edu.internet2.middleware.grouper.grouperUi.serviceLogic.UiV2Group

2016-02-11 17:18:35,355: [http-8089-4] ERROR GrouperUiRestServlet.doGet(321) - - Problem calling reflection from URL: edu.internet2.middleware.grouper.grouperUi.serviceLogic.UiV2Group.groupEditCompositeSubmit

net.sf.json.JSONException: Expected a ':' after a key at character 7 of {"list":[

{"timestamp":1455216205366,"uuid":"c83ddd154675459bbd95ed1bf084ee4f"}

,

{"timestamp":1455216205195,"uuid":"55b7f1fa2e4b4681bec6672a27f8f6f6"}

,

{"timestamp":1455216205026,"uuid":"902f390b8bb140dcb457d73e93629bd8"}

]},
Problem calling method groupEditCompositeSubmit on edu.internet2.middleware.grouper.grouperUi.serviceLogic.UiV2Group
at net.sf.json.util.JSONTokener.syntaxError(JSONTokener.java:505)
at net.sf.json.JSONObject._fromJSONTokener(JSONObject.java:1175)
at net.sf.json.JSONObject._fromString(JSONObject.java:1373)
at net.sf.json.JSONObject.fromObject(JSONObject.java:161)
at net.sf.json.JSONObject.fromObject(JSONObject.java:130)
at edu.internet2.middleware.grouper.util.GrouperUtil.jsonConvertFrom(GrouperUtil.java:1664)
at edu.internet2.middleware.grouper.userData.UserDataList.jsonMarshalFrom(UserDataList.java:31)
at edu.internet2.middleware.grouper.userData.GrouperUserDataApi$GrouperUserDataType.add(GrouperUserDataApi.java:273)
at edu.internet2.middleware.grouper.userData.GrouperUserDataApi$5.callback(GrouperUserDataApi.java:868)
at edu.internet2.middleware.grouper.GrouperSession.callbackGrouperSession(GrouperSession.java:974)
at edu.internet2.middleware.grouper.userData.GrouperUserDataApi.recentlyUsedGroupAdd(GrouperUserDataApi.java:852)
at edu.internet2.middleware.grouper.grouperUi.serviceLogic.UiV2Group.groupEditCompositeSubmit(UiV2Group.java:4282)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at edu.internet2.middleware.grouper.util.GrouperUtil.invokeMethod(GrouperUtil.java:4002)
at edu.internet2.middleware.grouper.util.GrouperUtil.callMethod(GrouperUtil.java:3953)
at edu.internet2.middleware.grouper.j2ee.GrouperUiRestServlet.doGet(GrouperUiRestServlet.java:288)
at edu.internet2.middleware.grouper.j2ee.GrouperUiRestServlet.doPost(GrouperUiRestServlet.java:160)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:643)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:723)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.owasp.csrfguard.CsrfGuardFilter.doFilter(CsrfGuardFilter.java:110)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at edu.internet2.middleware.grouper.ui.GrouperUiFilter.doFilter(GrouperUiFilter.java:1023)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:563)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:861)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:606)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
at java.lang.Thread.run(Thread.java:662)