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### Description During de-registration, Kamailio receives REGISTER (with expire 0), and then send Session Termination request, and only after getting Session Termination Answer, Kamailo sends 200OK. This is not sent till UE. The reason is after receiving Session Termination Request, the PCRF sends ReAuthRequest towards PCEF and it followed delete bearer procedure in IMS-PGW and bearer is getting deleted :(. <!-- Explain what you did, what you expected to happen, and what actually happened. --> In the kamailio script, pcscf_save() is used after receiving 200OK from SCSCF. And within this function, STR is sent and STA received.

### Troubleshooting

#### Reproduction

<!-- If the issue can be reproduced, describe how it can be done. --> RX_SUPPORT flag shall be defined and it can be observed in De-registration procedure. #### Debugging Data

<!-- If you got a core dump, use gdb to extract troubleshooting data - full backtrace, local variables and the list of the code at the issue location.

gdb /path/to/kamailio /path/to/corefile bt full info locals list

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``` (paste your debugging data here) ```

#### Log Messages

<!-- Check the syslog file and if there are relevant log messages printed by Kamailio, add them next, or attach to issue, or provide a link to download them (e.g., to a pastebin site). -->

``` (paste your log messages here) ```

#### SIP Traffic

<!-- If the issue is exposed by processing specific SIP messages, grab them with ngrep or save in a pcap file, then add them next, or attach to issue, or provide a link to download them (e.g., to a pastebin site). -->

``` (paste your sip traffic here) ```

### Possible Solutions

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### Additional Information

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

``` kamailio --version version: kamailio 5.7.5 (x86_64/linux) 58499a-dirty flags: USE_TCP, USE_TLS, USE_SCTP, TLS_HOOKS, USE_RAW_SOCKS, DISABLE_NAGLE, USE_MCAST, DNS_IP_HACK, SHM_MMAP, PKG_MALLOC, MEM_JOIN_FREE, Q_MALLOC, F_MALLOC, TLSF_MALLOC, DBG_SR_MEMORY, USE_FUTEX, FAST_LOCK-ADAPTIVE_WAIT, USE_DNS_CACHE, USE_DNS_FAILOVER, USE_NAPTR, USE_DST_BLOCKLIST, HAVE_RESOLV_RES, TLS_PTHREAD_MUTEX_SHARED ADAPTIVE_WAIT_LOOPS 1024, MAX_RECV_BUFFER_SIZE 262144, MAX_URI_SIZE 1024, BUF_SIZE 65535, DEFAULT PKG_SIZE 8MB poll method support: poll, epoll_lt, epoll_et, sigio_rt, select. id: 58499a -dirty compiled on 11:23:55 May 8 2024 with gcc 9.4.0 ```

* **Operating System**:

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``` uname -a Linux openims-tvmcfg-node-focal 5.4.0-181-generic #201-Ubuntu SMP Thu Mar 28 15:39:01 UTC 2024 x86_64 x86_64 x86_64 GNU/Linux ```