Upgraded from 3.0 to 5.0.  I'm receiving the following in my error logs:

zabbix_server [817546]: ERROR file:dbconfig.c,line:2228 Something impossible has just happened.
817546:20200703:122918.757 === Backtrace: ===
817546:20200703:122918.758 9: /usr/sbin/zabbix_server: configuration syncer [synced configuration in 0.213020 sec, syncing configuration](zbx_backtrace+0x52) [0x5648a8e8e646]
817546:20200703:122918.758 8: /usr/sbin/zabbix_server: configuration syncer [synced configuration in 0.213020 sec, syncing configuration](+0x1a77d4) [0x5648a8e527d4]
817546:20200703:122918.758 7: /usr/sbin/zabbix_server: configuration syncer [synced configuration in 0.213020 sec, syncing configuration](DCsync_configuration+0xb6a) [0x5648a8e5a619]
817546:20200703:122918.758 6: /usr/sbin/zabbix_server: configuration syncer [synced configuration in 0.213020 sec, syncing configuration](dbconfig_thread+0x1cb) [0x5648a8d02221]
817546:20200703:122918.758 5: /usr/sbin/zabbix_server: configuration syncer [synced configuration in 0.213020 sec, syncing configuration](zbx_thread_start+0x3b) [0x5648a8e9e42b]
817546:20200703:122918.758 4: /usr/sbin/zabbix_server: configuration syncer [synced configuration in 0.213020 sec, syncing configuration](MAIN_ZABBIX_ENTRY+0x9e8) [0x5648a8cf31bc]
817546:20200703:122918.758 3: /usr/sbin/zabbix_server: configuration syncer [synced configuration in 0.213020 sec, syncing configuration](daemon_start+0x303) [0x5648a8e8e188]
817546:20200703:122918.758 2: /usr/sbin/zabbix_server: configuration syncer [synced configuration in 0.213020 sec, syncing configuration](main+0x309) [0x5648a8cf27be]
817546:20200703:122918.758 1: /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf3) [0x7f2c8d4440b3]
817546:20200703:122918.758 0: /usr/sbin/zabbix_server: configuration syncer [synced configuration in 0.213020 sec, syncing configuration](_start+0x2e) [0x5648a8cf17ae]