Problem creating projects

While creating projects I get this error any hint to solve this:

Traceback (most recent call last):
  File "/opt/openerp/server/bin/netsvc.py", line 489, in dispatch
    result = ExportService.getService(service_name).dispatch(method, auth, params)
  File "/opt/openerp/server/bin/service/web_services.py", line 599, in dispatch
    res = fn(db, uid, *params)
  File "/opt/openerp/server/bin/osv/osv.py", line 122, in wrapper
    return f(self, dbname, *args, **kwargs)
  File "/opt/openerp/server/bin/osv/osv.py", line 176, in execute
    res = self.execute_cr(cr, uid, obj, method, *args, **kw)
  File "/opt/openerp/server/bin/osv/osv.py", line 167, in execute_cr
    return getattr(object, method)(cr, uid, *args, **kw)
  File "/opt/openerp/server/bin/osv/orm.py", line 3688, in create
    self._validate(cr, user, [id_new], context)
  File "/opt/openerp/server/bin/osv/orm.py", line 928, in _validate
    if not fun(self, cr, uid, ids):
  File "/opt/openerp/server/bin/addons/project_issue/project_issue.py", line 489, in _check_escalation
    if project_obj.project_escalation_id:
  File "/opt/openerp/server/bin/osv/orm.py", line 292, in __getattr__
    return self[name]
  File "/opt/openerp/server/bin/osv/orm.py", line 205, in __getitem__
    field_values = self._table.read(self._cr, self._uid, ids, field_names, context=self._context, load="_classic_write")
  File "/opt/openerp/server/bin/osv/orm.py", line 2944, in read
    result = self._read_flat(cr, user, select, fields, context, load)
  File "/opt/openerp/server/bin/osv/orm.py", line 3003, in _read_flat
    cr.execute(query, (tuple(sub_ids),))
  File "/opt/openerp/server/bin/sql_db.py", line 78, in wrapper
    return f(self, *args, **kwargs)
  File "/opt/openerp/server/bin/sql_db.py", line 131, in execute
    res = self._obj.execute(query, params)
ProgrammingError: column project_project.x_date does not exist
LINE 1: ...ject_project.priority,project_project.total_hours,project_pr...
                                                             ^