Steps to reproduce:

1. Upgraded Zabbix packages from 6.4.10 to 6.4.11 (apt-get, Debian 12)

Result:

```

 1383:20240129:130411.709 Starting Zabbix Server. Zabbix 6.4.11 (revision fb6439a26e3).
  1383:20240129:130411.709 ****** Enabled features ******
  1383:20240129:130411.709 SNMP monitoring:           YES
  1383:20240129:130411.709 IPMI monitoring:           YES
  1383:20240129:130411.709 Web monitoring:            YES
  1383:20240129:130411.709 VMware monitoring:         YES
  1383:20240129:130411.709 SMTP authentication:       YES
  1383:20240129:130411.709 ODBC:                      YES
  1383:20240129:130411.709 SSH support:               YES
  1383:20240129:130411.709 IPv6 support:              YES
  1383:20240129:130411.709 TLS support:               YES
  1383:20240129:130411.709 ******************************
  1383:20240129:130411.709 using configuration file: /etc/zabbix/zabbix_server.conf
  1383:20240129:130411.889 current database version (mandatory/optional): 06040000/06040026
  1383:20240129:130411.889 required mandatory version: 06040000
  1393:20240129:130412.009 starting HA manager
  1393:20240129:130412.038 HA manager started in active mode
  1383:20240129:130412.039 server #0 started [main process]
  1395:20240129:130412.040 server #1 started service manager #1
  1396:20240129:130412.041 server #2 started configuration syncer #1
  1396:20240129:130416.342 __mem_malloc: skipped 19 asked 824008 skip_min 344 skip_max 712616
  1396:20240129:130416.352 __mem_malloc: skipped 19 asked 824008 skip_min 344 skip_max 712616
  1396:20240129:130416.352 === memory statistics for configuration cache ===
  1396:20240129:130416.352 free chunks of size     24 bytes:       23
  1396:20240129:130416.352 free chunks of size     32 bytes:       17
  1396:20240129:130416.352 free chunks of size >= 256 bytes:       19
  1396:20240129:130416.352 min chunk size:         24 bytes
  1396:20240129:130416.352 max chunk size:     712616 bytes
  1396:20240129:130416.352 memory of total size 29248096 bytes fragmented into 269123 chunks
  1396:20240129:130416.352 of those,    1550304 bytes are in       59 free chunks
  1396:20240129:130416.352 of those,   27697792 bytes are in   269064 used chunks
  1396:20240129:130416.352 of those,    4305952 bytes are used by allocation overhead
  1396:20240129:130416.352 ================================
  1396:20240129:130416.352 === Backtrace: ===
  1396:20240129:130416.353 15: /usr/sbin/zabbix_server: configuration syncer [syncing configuration](zbx_backtrace+0x46) [0x5592cf4083e6]
  1396:20240129:130416.353 14: /usr/sbin/zabbix_server: configuration syncer [syncing configuration](__zbx_shmem_realloc+0x3ef) [0x5592cf34d3bf]
  1396:20240129:130416.353 13: /usr/sbin/zabbix_server: configuration syncer [syncing configuration](zbx_hashset_reserve+0x62) [0x5592cf372a72]
  1396:20240129:130416.353 12: /usr/sbin/zabbix_server: configuration syncer [syncing configuration](zbx_hashset_insert_ext+0xa6) [0x5592cf372be6]
  1396:20240129:130416.353 11: /usr/sbin/zabbix_server: configuration syncer [syncing configuration](dc_strpool_intern+0x6f) [0x5592cf2c51bf]
  1396:20240129:130416.353 10: /usr/sbin/zabbix_server: configuration syncer [syncing configuration](dc_strpool_replace+0x31) [0x5592cf2c88b1]
  1396:20240129:130416.353 9: /usr/sbin/zabbix_server: configuration syncer [syncing configuration](+0x1c3373) [0x5592cf2d4373]
  1396:20240129:130416.353 8: /usr/sbin/zabbix_server: configuration syncer [syncing configuration](DCsync_configuration+0x27de) [0x5592cf2e1e3e]
  1396:20240129:130416.353 7: /usr/sbin/zabbix_server: configuration syncer [syncing configuration](dbconfig_thread+0xed) [0x5592cf1a12bd]
  1396:20240129:130416.353 6: /usr/sbin/zabbix_server: configuration syncer [syncing configuration](zbx_thread_start+0x20) [0x5592cf354e40]
  1396:20240129:130416.353 5: /usr/sbin/zabbix_server: configuration syncer [syncing configuration](+0x8e4f8) [0x5592cf19f4f8]
  1396:20240129:130416.353 4: /usr/sbin/zabbix_server: configuration syncer [syncing configuration](MAIN_ZABBIX_ENTRY+0xe37) [0x5592cf1a09c7]
  1396:20240129:130416.353 3: /usr/sbin/zabbix_server: configuration syncer [syncing configuration](main+0x242) [0x5592cf195772]
  1396:20240129:130416.353 2: /lib/x86_64-linux-gnu/libc.so.6(+0x271ca) [0x7ff737acd1ca]
  1396:20240129:130416.353 1: /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0x85) [0x7ff737acd285]
  1396:20240129:130416.354 0: /usr/sbin/zabbix_server: configuration syncer [syncing configuration](_start+0x21) [0x5592cf19c741]
  1396:20240129:130416.354 file:dbconfig.c,line:110 __zbx_shmem_realloc(): out of memory (requested 824008 bytes)
  1396:20240129:130416.354 file:dbconfig.c,line:110 __zbx_shmem_realloc(): please increase CacheSize configuration parameter
  1383:20240129:130417.014 One child process died (PID:1396,exitcode/signal:1). Exiting ...
  1393:20240129:130417.014 HA manager has been paused
  1393:20240129:130417.022 HA manager has been stopped
  1383:20240129:130417.024 Zabbix Server stopped. Zabbix 6.4.11 (revision fb6439a26e3).```

Expected:
Service running