How do I go about this error?
Trying to upgrade Project

RPC_ERROR
Odoo Server Error
Traceback (most recent call last):
File "/home/odoo/src/odoo/odoo/tools/ convert.py", line 683, in _tag_root
f(rec)
File "/home/odoo/src/ odoo/odoo/tools/ convert.py", line 586, in _tag_record
record = model._load_records([data], self.mode == 'update')
File "/home/odoo/src/odoo/odoo/ models. py", line 4420, in _load_records
data['record']._load_records_write(data['values'])
File "/home/odoo/src/odoo/odoo/ models.py", line 4344, in _load_records_write
self.write (values)
File"/home/odoo/src/enterprise/web_studio/models/studio_mixin.py",line 28, in write
res = super(StudioMixin, self).write(vals)
File "/home/odoo/src/odoo/addons/mail/models/ res_groups.py", line 17, in write
res = super(ResGroups , self).write(vals)
File "/home/odoo/src/odoo/odoo/addons/base/models/ res_users.py", line 1186, in write
res = super(GroupsView, self).write(values)
File "/home/odoo/src/odoo/odoo/addons/base/models/ res_users.py", line 1095, in write
self._check_one_user_type()
File "/home/odoo/src/odoo/odoo/addons/base /models/ res_users.py", line 162, in _check_one_user_type
self.users._check_one_user_type()
File "/home/odoo/src/odoo/addons/account/models/ res_users.py", line 13, in _check_one_user_type
super(Users, self)._check_one_user_type()
File "/home/odoo/src/odoo/odoo/ addons/base/models/ res_users.py", line 489, in _check_one_user_type
raise ValidationError(_('The user cannot have more than one user types.'))
odoo.exceptions.ValidationError: The user cannot have more than one user types .

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
File " /home/odoo/src/odoo/odoo/addons/base/models/ir_http.py", line 237, in _dispatch
result = request.dispatch()
File "/home/odoo/src/odoo/odoo/ http.py", line 687, in dispatch
result = self._call_function(**self.params)
File "/home/odoo/src/odoo/odoo/ http. py", line 359, in _call_function
return checked_call(self.db, *args, **kwargs)
File "/home/odoo/src/odoo/odoo/service/ model.py", line 94, in wrapper
return f( dbname, *args, **kwargs)
File "/home/odoo/src/odoo/odoo/ http.py", line 348, in checked_call
result = self.endpoint(*a, **kw)
File "/home/ odoo/src/odoo/odoo/ http.py", line 916, in __call__
return self.method(*args, **kw)
File "/home/odoo/src/odoo/odoo/http.py", line 535, in response_wrap
response = f(*args, **kw)
File "/home/odoo/src/odoo/addons/web/controllers/ main.py", line 1346, in call_button
action = self._call_kw(model, method, args, kwargs)
File "/home/odoo/src/odoo/addons/web/controllers/ main.py", line 1334, in _call_kw
return call_kw(request.env[model], method , args, kwargs)
File "/home/odoo/src/odoo/odoo/ api.py", line 464, in call_kw
result = _call_kw_multi(method, model, args, kwargs)
File "/home/odoo/src/odoo /odoo/ api.py", line 451, in _call_kw_multi
result = method(recs, *args, **kwargs)
File "", line 2, in button_immediate_upgrade
File "/home/odoo/src/odoo/odoo/addons/base/models/ ir_module.py", line 74, in check_and_log
return method(self, *args, **kwargs)
File "/home/odoo/src/odoo/odoo/addons/base/models/ ir_module.py", line 666, in button_immediate_upgrade
return self._button_immediate_function(type(self).button_upgrade)
File " /home/odoo/src/odoo/odoo/addons/base/models/ ir_module.py", line 603, in _button_immediate_function
registry = modules.registry.Registry.new(self._cr.dbname, update_module=True)
File "/ home/odoo/src/odoo/odoo/modules/ registry.py",line 87, new
odoo.modules.load_modules(registry, force_demo, status, update_module)
File "/home/odoo/src/odoo/odoo/modules/ loading.py", line 470, in load_modules
processed_modules += load_marked_modules(cr, graph,
File " /home/odoo/src/odoo/odoo/modules/ loading.py", line 363, in load_marked_modules
loaded, processed = load_module_graph(
File "/home/odoo/src/odoo/odoo/modules/ loading.py", line 222, in load_module_graph load_data
(cr, idref, mode, kind='data', package=package)
File "/home/odoo/src/odoo/odoo/modules/ loading.py", line 69, in
load_data tools.convert_file (cr, package.name, filename, idref, mode,noupdate, kind)
File "/home/odoo/src/odoo/odoo/tools/ convert.py", line 748, in convert_file
convert_xml_import(cr, module, fp, idref, mode, noupdate)
File "/home/odoo/src/odoo/ odoo/tools/ convert.py", line 814, in convert_xml_import
obj.parse(doc.getroot())
File "/home/odoo/src/odoo/odoo/tools/ convert.py", line 734, in parse
self ._tag_root(de)
File "/home/odoo/src/odoo/odoo/tools/ convert.py", line 694, in _tag_root
raise ParseError(msg) from None # Restart with "--log-handler odoo.tools. convert:DEBUG" for complete traceback
Exception

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
File "/home/odoo/src/odoo/odoo/ http.py", line 643, in _handle_exception
return super(JsonRequest, self) ._handle_exception(exception)
File "/home/odoo/src/odoo/odoo/ http.py", line 301, in _handle_exception
raise exception.with_traceback(None) from new_cause
odoo.tools.convert.ParseError: while parsing /home/ odoo/src/odoo/addons/project/security/project_security.xml:9
The user cannot have more than one user types.

View error context:
'-no context-'