In Odoo 15, when I want to upgrade list aplication or install/uninstall module I get:
ValueError: Wrong value for ir.module.module.license 'defaults: LGPL-3'

I added in my modules lines: 'license': 'defaults: LGPL-3', but it still doesn't works.

Traceback (most recent call last):
  File "E:\odoo\odoo\addons\base\models\ir_http.py", line 237, in _dispatch
    result = request.dispatch()
  File "E:\odoo\odoo\http.py", line 687, in dispatch
    result = self._call_function(**self.params)
  File "E:\odoo\odoo\http.py", line 359, in _call_function
    return checked_call(self.db, *args, **kwargs)
  File "E:\odoo\odoo\service\model.py", line 94, in wrapper
    return f(dbname, *args, **kwargs)
  File "E:\odoo\odoo\http.py", line 348, in checked_call
    result = self.endpoint(*a, **kw)
  File "E:\odoo\odoo\http.py", line 916, in __call__
    return self.method(*args, **kw)
  File "E:\odoo\odoo\http.py", line 535, in response_wrap
    response = f(*args, **kw)
  File "e:\odoo\addons\web\controllers\main.py", line 1339, in call_button
    action = self._call_kw(model, method, args, kwargs)
  File "e:\odoo\addons\web\controllers\main.py", line 1327, in _call_kw
    return call_kw(request.env[model], method, args, kwargs)
  File "E:\odoo\odoo\api.py", line 464, in call_kw
    result = _call_kw_multi(method, model, args, kwargs)
  File "E:\odoo\odoo\api.py", line 451, in _call_kw_multi
    result = method(recs, *args, **kwargs)
  File "", line 2, in button_immediate_install
  File "E:\odoo\odoo\addons\base\models\ir_module.py", line 74, in check_and_log
    return method(self, *args, **kwargs)
  File "E:\odoo\odoo\addons\base\models\ir_module.py", line 483, in button_immediate_install
    return self._button_immediate_function(type(self).button_install)
  File "E:\odoo\odoo\modules\registry.py", line 87, in new
    odoo.modules.load_modules(registry, force_demo, status, update_module)
  File "E:\odoo\odoo\modules\loading.py", line 433, in load_modules
    Module.update_list()
  File "", line 2, in update_list
  File "E:\odoo\odoo\addons\base\models\ir_module.py", line 74, in check_and_log
    return method(self, *args, **kwargs)
  File "E:\odoo\odoo\addons\base\models\ir_module.py", line 767, in update_list
    mod.write(updated_values)
  File "E:\odoo\odoo\models.py", line 3851, in write
    field.write(self, value)
  File "E:\odoo\odoo\fields.py", line 1015, in write
    cache_value = self.convert_to_cache(value, records)
  File "E:\odoo\odoo\fields.py", line 2534, in convert_to_cache
    raise ValueError("Wrong value for %s: %r" % (self, value))
Exception

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

Traceback (most recent call last):
  File "E:\odoo\odoo\http.py", line 643, in _handle_exception
    return super(JsonRequest, self)._handle_exception(exception)
  File "E:\odoo\odoo\http.py", line 301, in _handle_exception
    raise exception.with_traceback(None) from new_cause
ValueError: Wrong value for ir.module.module.license 'defaults: LGPL-3'