After configuring openERP 7.0 to my needs and installing CRM, I thought it's time to uploaed some leads. Which I did and it worked fine. Just the lead tree view had some fields which were not necessary. So I activated the developer mode and removed the fields from the tree view. However, when I got back I got an error message (field not defined or empty) and the leads wouldn't show anymore. Since I couldn't remember which fields I just removed I thought I uninstall the CRM app and re-install it. Uninstall went without a hitch but re-installation failed. I got the following error message:

OpenERP Server Error

Client Traceback (most recent call last):
  File "/usr/lib/pymodules/python2.7/openerp/addons/web/http.py", line 195, in dispatch
    response["result"] = method(self, **self.params)
  File "/usr/lib/pymodules/python2.7/openerp/addons/web/controllers/main.py", line 1083, in call_button
    action = self._call_kw(req, model, method, args, {})
  File "/usr/lib/pymodules/python2.7/openerp/addons/web/controllers/main.py", line 1071, in _call_kw
    return getattr(req.session.model(model), method)(*args, **kwargs)
  File "/usr/lib/pymodules/python2.7/openerp/addons/web/session.py", line 43, in proxy
    result = self.proxy.execute_kw(self.session._db, self.session._uid, self.session._password, self.model, method, args, kw)
  File "/usr/lib/pymodules/python2.7/openerp/addons/web/session.py", line 31, in proxy_method
    result = self.session.send(self.service_name, method, *args)
  File "/usr/lib/pymodules/python2.7/openerp/addons/web/session.py", line 104, in send
    raise xmlrpclib.Fault(openerp.tools.ustr(e), formatted_info)


Server Traceback (most recent call last):
  File "/usr/lib/pymodules/python2.7/openerp/addons/web/session.py", line 90, in send
    return openerp.netsvc.dispatch_rpc(service_name, method, args)
  File "/usr/lib/pymodules/python2.7/openerp/netsvc.py", line 295, in dispatch_rpc
    result = ExportService.getService(service_name).dispatch(method, params)
  File "/usr/lib/pymodules/python2.7/openerp/service/web_services.py", line 614, in dispatch
    res = fn(db, uid, *params)
  File "/usr/lib/pymodules/python2.7/openerp/osv/osv.py", line 169, in execute_kw
    return self.execute(db, uid, obj, method, *args, **kw or {})
  File "/usr/lib/pymodules/python2.7/openerp/osv/osv.py", line 123, in wrapper
    return f(self, dbname, *args, **kwargs)
  File "/usr/lib/pymodules/python2.7/openerp/osv/osv.py", line 179, in execute
    res = self.execute_cr(cr, uid, obj, method, *args, **kw)
  File "/usr/lib/pymodules/python2.7/openerp/osv/osv.py", line 166, in execute_cr
    return getattr(object, method)(cr, uid, *args, **kw)
  File "/usr/lib/pymodules/python2.7/openerp/addons/base/module/wizard/base_module_upgrade.py", line 90, in upgrade_module
    pooler.restart_pool(cr.dbname, update_module=True)
  File "/usr/lib/pymodules/python2.7/openerp/pooler.py", line 39, in restart_pool
    registry = RegistryManager.new(db_name, force_demo, status, update_module)
  File "/usr/lib/pymodules/python2.7/openerp/modules/registry.py", line 214, in new
    openerp.modules.load_modules(registry.db, force_demo, status, update_module)
  File "/usr/lib/pymodules/python2.7/openerp/modules/loading.py", line 347, in load_modules
    processed = load_marked_modules(cr, graph, states_to_load, force, status, report, loaded_modules, update_module)
  File "/usr/lib/pymodules/python2.7/openerp/modules/loading.py", line 258, in load_marked_modules
    loaded, processed = load_module_graph(cr, graph, progressdict, report=report, skip_modules=loaded_modules, perform_checks=perform_checks)
  File "/usr/lib/pymodules/python2.7/openerp/modules/loading.py", line 167, in load_module_graph
    init_module_models(cr, package.name, models)
  File "/usr/lib/pymodules/python2.7/openerp/modules/module.py", line 374, in init_module_models
    result = obj._auto_init(cr, {'module': module_name})
  File "/usr/lib/pymodules/python2.7/openerp/osv/orm.py", line 3162, in _auto_init
    default = self._defaults[k](self, cr, SUPERUSER_ID, context)
  File "/usr/lib/pymodules/python2.7/openerp/addons/crm/crm_lead.py", line 320, in <lambda>
    'company_id': lambda s, cr, uid, c: s.pool.get('res.company')._company_default_get(cr, uid, 'crm.lead', context=c),
  File "/usr/lib/pymodules/python2.7/openerp/addons/base/res/res_company.py", line 216, in _company_default_get
    return user.company_id.id
  File "/usr/lib/pymodules/python2.7/openerp/osv/orm.py", line 484, in __getattr__
    return self[name]
  File "/usr/lib/pymodules/python2.7/openerp/osv/orm.py", line 399, in __getitem__
    field_values = self._table.read(self._cr, self._uid, ids, field_names, context=self._context, load="_classic_write")
  File "/usr/lib/pymodules/python2.7/openerp/addons/base/res/res_users.py", line 793, in read
    res = super(users_view, self).read(cr, uid, ids, fields, context=context, load=load)
  File "/usr/lib/pymodules/python2.7/openerp/addons/base/res/res_users.py", line 268, in read
    result = super(res_users, self).read(cr, uid, ids, fields=fields, context=context, load=load)
  File "/usr/lib/pymodules/python2.7/openerp/osv/orm.py", line 3604, in read
    result = self._read_flat(cr, user, select, fields, context, load)
  File "/usr/lib/pymodules/python2.7/openerp/osv/orm.py", line 3680, in _read_flat
    res2 = self.pool.get(table).read(cr, user, [x[col] for x in res], cols, context, load)
  File "/usr/lib/pymodules/python2.7/openerp/osv/orm.py", line 3604, in read
    result = self._read_flat(cr, user, select, fields, context, load)
  File "/usr/lib/pymodules/python2.7/openerp/osv/orm.py", line 3656, in _read_flat
    cr.execute(query, [tuple(sub_ids)] + rule_params)
  File "/usr/lib/pymodules/python2.7/openerp/sql_db.py", line 162, in wrapper
    return f(self, *args, **kwargs)
  File "/usr/lib/pymodules/python2.7/openerp/sql_db.py", line 227, in execute
    res = self._obj.execute(query, params)
ProgrammingError: column res_partner.section_id does not exist
LINE 1: ..._partner."is_company",res_partner."vat_subjected",res_partne...
                                                             ^

So now, I am f**d. Any idea what I can do?