Same Pool Server in list

Hello!

I have restarted my NTPd and the following happened.

root@amd-x4:~# ntpq -p
remote refid st t when poll reach delay offset
jitter
==============================================================================
*gamma.rueckgr.a 131.188.3.222 2 u 3 64 1 27.690 8.062
4.518
+mail.danzuck.eu 192.53.103.103 2 u 2 64 1 26.608 10.621
1.757
evie.fra1.as411 78.47.148.174 3 u 1 64 1 36.242 8.622
4.338
evie.fra1.as411 78.47.148.174 3 u 2 64 1 27.690 9.442
2.231
europium.canoni 193.79.237.14 2 u 9 64 1 37.602 8.374
0.000
router.lan 129.70.130.70 3 u 2 64 1 0.530 1.327
0.114

Twice the same NTP server in the list.

root@amd-x4:~# ntpq -pn
remote refid st t when poll reach delay offset
jitter
==============================================================================
+78.47.148.174 131.188.3.222 2 u 7 64 1 27.690 8.062
4.518
*178.162.174.191 192.53.103.103 2 u 6 64 1 26.608 10.621
1.757
2a01:4f8:d13:23 78.47.148.174 3 u 5 64 1 36.242 8.622
4.338
78.46.221.42 78.47.148.174 3 u 4 64 1 27.690 9.442
3.712
91.189.94.4 193.79.237.14 2 u 13 64 1 37.602 8.374
0.000
+192.168.222.254 129.70.130.70 3 u 2 64 1 0.412 0.971
0.267

I use the pool server and I have IPv6 connectivity. How can i
prevent that the same NTP Server is in the list?

My Server list:

server 0.de.pool.ntp.org iburst
server 1.de.pool.ntp.org iburst
server 2.de.pool.ntp.org iburst
server 3.de.pool.ntp.org iburst
server ntp.ubuntu.com
server 192.168.222.254 iburst

--
Best regards
Marc-Andre Alpers
.

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