restart_policy on CreateDispatch

[w2kzx80]

I receive such error
failed to unmarshal json response: Error occurred during parsing: Error occurred during parsing: restart_policy is unknown.

Thats piece of code I used

                                    $lk_dispatch_err=null;
                                    $resp=null;
                                    try {
                                        $videoGrant = new VideoGrant();
                                        $videoGrant->setRoomName($_ROOM);
                                        $videoGrant->setRoomAdmin();
                                        $tokenOptions = (new AccessTokenOptions())->setTtl(10 * 60);
                                        $accessToken = (new AccessToken($_API_KEY, $_API_SECRET))
                                            ->init($tokenOptions)
                                            ->setGrant($videoGrant);
                                        $ctx = Context::withHttpRequestHeaders([], [
                                            'Authorization' => 'Bearer '.$accessToken->toJwt(),
                                        ]);
                                        $ad=new AgentDispatchServiceJsonClient($_LK_URL);
                                        $dispatch_request=[
                                            'agent_name'=>$_AGENT_NAME
                                            'room'=>$_ROOM,
                                            'metadata'=>$_AGENT_METADATA,
                                        ];
                                        $resp=$ad->CreateDispatch($ctx,new CreateAgentDispatchRequest($dispatch_request));
                                    } catch (\Throwable $t) {
                                        $lk_dispatch_err='CreateDispatch: '.$t->getMessage();
                                        elog('LIVEKIT ERROR '.$lk_dispatch_err);
                                    }