passport: "Call to a member function forceFill() on null" Error when calling $user->createToken('Foo')->accessToken

Same issue as the one below link. https://laracasts.com/discuss/channels/laravel/call-to-a-member-function-forcefill-on-null-error-when-calling-user-createtokentoken-accesstoken

This happens sometimes. It’s not every time. Do you have any idea of reason and solution?

/www/vendor/laravel/passport/src/PersonalAccessTokenFactory.php

    public function make($userId, $name, array $scopes = [])
    {
        $response = $this->dispatchRequestToAuthorizationServer(
            $this->createRequest($this->clients->personalAccessClient(), $userId, $scopes)
        );
 
        $token = tap($this->findAccessToken($response), function ($token) use ($userId, $name) {
            $this->tokens->save($token->forceFill([
                'user_id' => $userId,
                'name' => $name,
            ]));
        });
 
        return new PersonalAccessTokenResult(
            $response['access_token'], $token
        );
    }