### Description Sometimes "registered" function return different result for different SIP worker process. It seems reproduced for a some time after restart. I have locate it on 4.4.6version and reproduce for master branch too. I tried Register/Unregister sip account while testing (via SIP)

### Troubleshooting

#### Reproduction ``` children=8

# registrar params modparam("registrar", "append_branches", 0) modparam("registrar", "use_path", 1) modparam("registrar", "path_mode", 0) modparam("registrar", "max_expires", 1800) modparam("registrar", "min_expires", 60)

# usrloc params modparam("usrloc", "db_mode", 2) modparam("usrloc", "timer_interval", 20) #default 60 modparam("usrloc", "db_check_update", 1) modparam("usrloc", "use_domain", 1) modparam("usrloc", "nat_bflag", FLB_NATB) modparam("usrloc", "db_ops_ruid", 1)

request_route{ route(REG); route(TESTREG); exit; }

route[SEND_TESTREG] { $uac_req(method)="PUBLISH"; $uac_req(ruri) = $tu; $uac_req(furi) = $tu; $uac_req(turi) = $tu; $uac_req(callid) = $ci; $uac_req(ouri) = "MYADDRPORT"; uac_req_send(); }

route[PRINT_REGISTERED] { if (registered("location", "$tu")){ xlog("L_INFO", "$rm $ci registered"); } else{ xlog("L_INFO", "$rm $ci NOT registered"); } }

route[REG] { if (!is_method("REGISTER")) return; xlog("L_INFO", "-------------------------------------"); route(PRINT_REGISTERED); if ( !save("location") ) { sl_reply_error(); exit; } route(PRINT_REGISTERED); # children=8 route(SEND_TESTREG); route(SEND_TESTREG); route(SEND_TESTREG); route(SEND_TESTREG); route(SEND_TESTREG); route(SEND_TESTREG); route(SEND_TESTREG); route(SEND_TESTREG); exit; }

route[TESTREG]{ if (!is_method("PUBLISH")) return; usleep("500"); route(PRINT_REGISTERED); sl_send_reply("200", "OK"); exit; } ```

#### Log Messages Oct 9 20:13:38 kamailio[19514] INFO: <script>: REGISTER vHUuAy7p-IzjmDD5jblwCsER9SPXm9Kg registered Oct 9 20:13:38 kamailio[19514] INFO: <script>: REGISTER vHUuAy7p-IzjmDD5jblwCsER9SPXm9Kg NOT registered Oct 9 20:13:38 kamailio[19525] INFO: <script>: PUBLISH vHUuAy7p-IzjmDD5jblwCsER9SPXm9Kg NOT registered Oct 9 20:13:38 kamailio[19519] INFO: <script>: PUBLISH vHUuAy7p-IzjmDD5jblwCsER9SPXm9Kg registered Oct 9 20:13:38 kamailio[19521] INFO: <script>: PUBLISH vHUuAy7p-IzjmDD5jblwCsER9SPXm9Kg NOT registered Oct 9 20:13:38 kamailio[19516] INFO: <script>: PUBLISH vHUuAy7p-IzjmDD5jblwCsER9SPXm9Kg NOT registered Oct 9 20:13:38 kamailio[19513] INFO: <script>: PUBLISH vHUuAy7p-IzjmDD5jblwCsER9SPXm9Kg registered Oct 9 20:13:38 kamailio[19514] INFO: <script>: PUBLISH vHUuAy7p-IzjmDD5jblwCsER9SPXm9Kg NOT registered Oct 9 20:13:38 kamailio[19523] INFO: <script>: PUBLISH vHUuAy7p-IzjmDD5jblwCsER9SPXm9Kg registered Oct 9 20:13:38 kamailio[19527] INFO: <script>: PUBLISH vHUuAy7p-IzjmDD5jblwCsER9SPXm9Kg registered

### Additional Information

* **Kamailio Version** - output of `kamailio -v`

``` version: kamailio 5.1.0-dev7 (x86_64/linux) ```