Get Call to /api/device-mgt/v1.0/devices/{type}/{id} returns 500 when the "If-Modified-Since" header is added to the request

[Megala21]

Following exception is thrown in the back-end,

[2017-04-21 10:17:28,968] [IoT-Core] ERROR - {org.wso2.carbon.device.mgt.jaxrs.service.impl.DeviceManagementServiceImpl} Error occurred while fetching the device information.
org.wso2.carbon.device.mgt.common.DeviceManagementException: Error occurred while obtaining the device for id 'd24f860f450352a41'
	at org.wso2.carbon.device.mgt.core.service.DeviceManagementProviderServiceImpl.getDevice(DeviceManagementProviderServiceImpl.java:914)
	at org.wso2.carbon.device.mgt.jaxrs.service.impl.DeviceManagementServiceImpl.getDevice(DeviceManagementServiceImpl.java:339)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.apache.cxf.service.invoker.AbstractInvoker.performInvocation(AbstractInvoker.java:188)
	at org.apache.cxf.service.invoker.AbstractInvoker.invoke(AbstractInvoker.java:104)
	at org.apache.cxf.jaxrs.JAXRSInvoker.invoke(JAXRSInvoker.java:204)
	at org.apache.cxf.jaxrs.JAXRSInvoker.invoke(JAXRSInvoker.java:101)
	at org.apache.cxf.interceptor.ServiceInvokerInterceptor$1.run(ServiceInvokerInterceptor.java:58)
	at org.apache.cxf.interceptor.ServiceInvokerInterceptor.handleMessage(ServiceInvokerInterceptor.java:94)
	at org.apache.cxf.phase.PhaseInterceptorChain.doIntercept(PhaseInterceptorChain.java:272)
	at org.apache.cxf.transport.ChainInitiationObserver.onMessage(ChainInitiationObserver.java:121)
	at org.apache.cxf.transport.http.AbstractHTTPDestination.invoke(AbstractHTTPDestination.java:249)
	at org.apache.cxf.transport.servlet.ServletController.invokeDestination(ServletController.java:248)
	at org.apache.cxf.transport.servlet.ServletController.invoke(ServletController.java:222)
	at org.apache.cxf.transport.servlet.ServletController.invoke(ServletController.java:153)
	at org.apache.cxf.transport.servlet.CXFNonSpringServlet.invoke(CXFNonSpringServlet.java:171)
	at org.apache.cxf.transport.servlet.AbstractHTTPServlet.handleRequest(AbstractHTTPServlet.java:289)
	at org.apache.cxf.transport.servlet.AbstractHTTPServlet.doGet(AbstractHTTPServlet.java:214)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:624)
	at org.apache.cxf.transport.servlet.AbstractHTTPServlet.service(AbstractHTTPServlet.java:265)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
	at org.wso2.carbon.device.mgt.jaxrs.ApiOriginFilter.doFilter(ApiOriginFilter.java:33)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
	at org.wso2.carbon.ui.filters.cache.ContentTypeBasedCachePreventionFilter.doFilter(ContentTypeBasedCachePreventionFilter.java:53)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
	at org.apache.catalina.filters.HttpHeaderSecurityFilter.doFilter(HttpHeaderSecurityFilter.java:120)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:218)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:110)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:615)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:169)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
	at org.wso2.carbon.tomcat.ext.valves.CompositeValve.continueInvocation(CompositeValve.java:99)
	at org.wso2.carbon.tomcat.ext.valves.CarbonTomcatValve$1.invoke(CarbonTomcatValve.java:47)
	at org.wso2.carbon.webapp.mgt.TenantLazyLoaderValve.invoke(TenantLazyLoaderValve.java:57)
	at org.wso2.carbon.webapp.authenticator.framework.WebappAuthenticationValve.processRequest(WebappAuthenticationValve.java:138)
	at org.wso2.carbon.webapp.authenticator.framework.WebappAuthenticationValve.invoke(WebappAuthenticationValve.java:68)
	at org.wso2.carbon.tomcat.ext.valves.TomcatValveContainer.invokeValves(TomcatValveContainer.java:47)
	at org.wso2.carbon.tomcat.ext.valves.CompositeValve.invoke(CompositeValve.java:62)
	at org.wso2.carbon.tomcat.ext.valves.CarbonStuckThreadDetectionValve.invoke(CarbonStuckThreadDetectionValve.java:159)
	at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:962)
	at org.wso2.carbon.tomcat.ext.valves.CarbonContextCreatorValve.invoke(CarbonContextCreatorValve.java:57)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:452)
	at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1087)
	at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:637)
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1760)
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1719)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	at java.lang.Thread.run(Thread.java:745)
Caused by: org.wso2.carbon.device.mgt.core.dao.DeviceManagementDAOException: Error occurred while listing device for type 'android'
	at org.wso2.carbon.device.mgt.core.dao.impl.AbstractDeviceDAOImpl.getDevice(AbstractDeviceDAOImpl.java:172)
	at org.wso2.carbon.device.mgt.core.service.DeviceManagementProviderServiceImpl.getDevice(DeviceManagementProviderServiceImpl.java:897)
	... 61 more
Caused by: org.h2.jdbc.JdbcSQLException: Column "DEVICE_MODEL" not found [42122-175]
	at org.h2.message.DbException.getJdbcSQLException(DbException.java:332)
	at org.h2.message.DbException.get(DbException.java:172)
	at org.h2.message.DbException.get(DbException.java:149)
	at org.h2.jdbc.JdbcResultSet.getColumnIndex(JdbcResultSet.java:3047)
	at org.h2.jdbc.JdbcResultSet.get(JdbcResultSet.java:3133)
	at org.h2.jdbc.JdbcResultSet.getString(JdbcResultSet.java:296)
	at org.wso2.carbon.device.mgt.core.dao.util.DeviceManagementDAOUtil.loadDeviceInfo(DeviceManagementDAOUtil.java:287)
	at org.wso2.carbon.device.mgt.core.dao.util.DeviceManagementDAOUtil.loadMatchingDevice(DeviceManagementDAOUtil.java:238)
	at org.wso2.carbon.device.mgt.core.dao.impl.AbstractDeviceDAOImpl.getDevice(AbstractDeviceDAOImpl.java:168)
	... 62 more