Openhab crashes after manually upgrade SNAPSHOT release

Hi.

I`ve just upgraded from Build #603 to #644.

This is the first time I try to do a upgrade.
I followed the manual on Wiki

Backed up the /opt/openhab2 folder and re-insterted config files as per instruction.
The system starts up and gives me a welcome screen on Paper UI, but Openhab crashes after minutes,
and I cant access Karaf or Paper UI.

org.osgi.framework.BundleException: Could not resolve module: org.eclipse.smarthome.model.item [121]
  Another singleton bundle selected: osgi.identity; osgi.identity="org.eclipse.smarthome.model.item"; type="osgi.bundle"; version:Version="0.9.0.201612171108"; singleton:="true"

        at org.eclipse.osgi.container.Module.start(Module.java:434)[org.eclipse.osgi-3.10.2.v20150203-1939.jar:]
        at org.eclipse.osgi.container.ModuleContainer.update(ModuleContainer.java:354)[org.eclipse.osgi-3.10.2.v20150203-1939.jar:]
        at org.eclipse.osgi.storage.Storage.update(Storage.java:713)[org.eclipse.osgi-3.10.2.v20150203-1939.jar:]
        at org.eclipse.osgi.internal.framework.EquinoxBundle.update(EquinoxBundle.java:439)[org.eclipse.osgi-3.10.2.v20150203-1939.jar:]
        at org.apache.karaf.features.internal.service.FeaturesServiceImpl.updateBundle(FeaturesServiceImpl.java:1185)[9:org.apache.karaf.features.core:4.0.4]
        at org.apache.karaf.features.internal.service.Deployer.deploy(Deployer.java:688)[9:org.apache.karaf.features.core:4.0.4]
        at org.apache.karaf.features.internal.service.FeaturesServiceImpl.doProvision(FeaturesServiceImpl.java:1089)[9:org.apache.karaf.features.core:4.0.4]
        at org.apache.karaf.features.internal.service.FeaturesServiceImpl$1.call(FeaturesServiceImpl.java:985)[9:org.apache.karaf.features.core:4.0.4]
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)[:1.8.0_101]
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)[:1.8.0_101]
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)[:1.8.0_101]
        at java.lang.Thread.run(Thread.java:745)[:1.8.0_101]
2016-12-19 23:56:35.749 [ERROR] [rg.ops4j.pax.web.utils.ClassPathUtil] - BundleWiring is null for: org.eclipse.smarthome.model.core_0.9.0.201612171108 [120]
2016-12-19 23:56:35.750 [ERROR] [rg.ops4j.pax.web.utils.ClassPathUtil] - BundleWiring is null for: org.eclipse.smarthome.model.item_0.9.0.201612171108 [121]
2016-12-19 23:56:35.757 [ERROR] [rg.ops4j.pax.web.utils.ClassPathUtil] - BundleWiring is null for: org.eclipse.smarthome.model.core_0.9.0.201612171108 [120]
2016-12-19 23:56:35.757 [ERROR] [rg.ops4j.pax.web.utils.ClassPathUtil] - BundleWiring is null for: org.eclipse.smarthome.model.item_0.9.0.201612171108 [121]
2016-12-19 23:56:35.895 [ERROR] [core.karaf.internal.FeatureInstaller] - Failed uninstalling 'openhab-binding-zwave': Error restarting bundles
2016-12-19 23:56:41.582 [ERROR] [core.karaf.internal.FeatureInstaller] - Failed uninstalling 'openhab-binding-chromecast': Error restarting bundles
2016-12-19 23:56:50.535 [ERROR] [core.karaf.internal.FeatureInstaller] - Failed uninstalling 'openhab-binding-samsungtv': Error occurred installing a bundle.
2016-12-19 23:56:50.541 [ERROR] [core.karaf.internal.FeatureInstaller] - Failed retrieving features: null
2016-12-19 23:56:50.542 [ERROR] [core.karaf.internal.FeatureInstaller] - Failed retrieving features: null
2016-12-19 23:56:50.542 [ERROR] [core.karaf.internal.FeatureInstaller] - Failed retrieving features: null

and goes on with same error until

2016-12-19 23:56:51.310 [ERROR] [core.karaf.internal.FeatureInstaller] - Failed uninstalling 'openhab-binding-network': Error restarting bundles
2016-12-19 23:56:55.864 [INFO ] [panel.internal.HABPanelDashboardTile] - Stopped HABPanel
2016-12-19 23:56:55.918 [ERROR] [core.karaf.internal.FeatureInstaller] - Failed uninstalling 'openhab-ui-habpanel': Error restarting bundles
2016-12-19 23:57:00.533 [INFO ] [ui.habmin.internal.servlet.HABminApp] - Stopped HABmin servlet
2016-12-19 23:57:01.161 [ERROR] [core.karaf.internal.FeatureInstaller] - Failed uninstalling 'openhab-ui-habmin': Error restarting bundles
2016-12-19 23:57:04.938 [DEBUG] [org.openhab.persistence.jdbc        ] - ServiceEvent UNREGISTERING - {org.openhab.core.persistence.PersistenceService, org.openhab.core.persistence.QueryablePersistenceService}={url=jdbc:mysql://192.168.$
2016-12-19 23:57:04.943 [DEBUG] [org.openhab.persistence.jdbc        ] - BundleEvent STOPPING - org.openhab.persistence.jdbc
2016-12-19 23:57:04.946 [DEBUG] [org.openhab.persistence.jdbc        ] - BundleEvent STOPPED - org.openhab.persistence.jdbc
2016-12-19 23:57:04.954 [DEBUG] [org.openhab.persistence.jdbc        ] - BundleEvent UNRESOLVED - org.openhab.persistence.jdbc
2016-12-19 23:57:05.122 [DEBUG] [org.openhab.persistence.jdbc        ] - BundleEvent UNINSTALLED - org.openhab.persistence.jdbc
2016-12-19 23:57:05.445 [ERROR] [core.karaf.internal.FeatureInstaller] - Failed uninstalling 'openhab-persistence-jdbc-mysql': Error restarting bundles
2016-12-19 23:57:10.033 [ERROR] [core.karaf.internal.FeatureInstaller] - Failed uninstalling 'openhab-persistence-mapdb': Error restarting bundles
2016-12-20 00:13:51.204 [ERROR] [rg.ops4j.pax.web.utils.ClassPathUtil] - BundleWiring is null for: org.eclipse.smarthome.model.rule_0.9.0.201612171108 [125]
2016-12-20 00:13:51.205 [ERROR] [rg.ops4j.pax.web.utils.ClassPathUtil] - BundleWiring is null for: org.eclipse.smarthome.model.item_0.9.0.201612171108 [121]
2016-12-20 00:13:51.207 [ERROR] [rg.ops4j.pax.web.utils.ClassPathUtil] - BundleWiring is null for: org.eclipse.smarthome.model.persistence_0.9.0.201612171108 [123]
2016-12-20 00:13:51.210 [ERROR] [rg.ops4j.pax.web.utils.ClassPathUtil] - BundleWiring is null for: org.eclipse.smarthome.model.core_0.9.0.201612171108 [120]
2016-12-20 00:13:51.216 [ERROR] [rg.ops4j.pax.web.utils.ClassPathUtil] - BundleWiring is null for: org.eclipse.smarthome.model.rule_0.9.0.201612171108 [125]
2016-12-20 00:13:51.218 [ERROR] [rg.ops4j.pax.web.utils.ClassPathUtil] - BundleWiring is null for: org.eclipse.smarthome.model.item_0.9.0.201612171108 [121]
2016-12-20 00:13:51.219 [ERROR] [rg.ops4j.pax.web.utils.ClassPathUtil] - BundleWiring is null for: org.eclipse.smarthome.model.persistence_0.9.0.201612171108 [123]
2016-12-20 00:13:51.223 [ERROR] [rg.ops4j.pax.web.utils.ClassPathUtil] - BundleWiring is null for: org.eclipse.smarthome.model.core_0.9.0.201612171108 [120]
2016-12-20 00:18:17.799 [INFO ] [el.core.internal.ModelRepositoryImpl] - Loading model 'default.items'
2016-12-20 00:18:18.133 [INFO ] [el.core.internal.ModelRepositoryImpl] - Loading model 'jdbc.persist'
2016-12-20 00:18:22.691 [INFO ] [el.core.internal.ModelRepositoryImpl] - Loading model 'default.sitemap'
2016-12-20 00:18:23.196 [INFO ] [el.core.internal.ModelRepositoryImpl] - Loading model 'default.things'
2016-12-20 00:18:23.238 [WARN ] [el.core.internal.ModelRepositoryImpl] - Configuration model 'default.things' is either empty or cannot be parsed correctly!
2016-12-20 00:18:23.253 [ERROR] [org.eclipse.smarthome.model.core    ] - [org.eclipse.smarthome.model.core.folderobserver(89)] The addModelParser method has thrown an exception
java.lang.NullPointerException

A lot has changed between those two builds including swapping out the configuration DB. I recommend wiping out your userdata folder and restart which will cause OH to regenerate that folder. Then move your configs back and see if that makes a difference. Be sure to backup your userdata folder before wiping it out just in case.