iptables – cloud-netconfig: adding multiple addresses to eth0 interface

We have IPTABLE (Natting) Server with SLES 12 running on Azure. We have multiple IP addresses assigned on the network interface of a virtual machine, but we have not configured them in the guest operating system.
The goal is to create NAT rules to transfer traffic to servers that are not accessible from an on-premises environment. Now the communication is good and you can also access the remote servers once the NAT rules are in place.

https://github.com/SUSE-Enceladus/cloud-netconfig

But in / var / log / message, we see messages frequently as follows

2019-05-15T12: 05: 09.516913-05: 00 mznaplapipt002 bash[63729]: Error: the inet prefix is ​​expected rather than "request / Too".
2019-05-15T12: 05: 09.516979-05: 00 mznaplapipt002 bash[63729]: <13>May 15 12:05:08 cloud-netconfig: adding multiple addresses to eth0 interface
2019-05-15T12: 05: 09.517042-05: 00 mznaplapipt002 bash[63729]: Error: the inet prefix is ​​expected rather than "many".
2019-05-15T12: 05: 09.517106-05: 00 mznaplapipt002 bash[63729]: <13>May 15 12:05:08 cloud-netconfig: adding address queries to eth0 interface
2019-05-15T12: 05: 09.517216-05: 00 mznaplapipt002 bash[63729]: Error: the inet prefix is ​​expected rather than "requests".
2019-05-15T12: 05: 09.517332-05: 00 mznaplapipt002 bash[63729]: Error: the inet prefix is ​​expected rather than "many".
2019-05-15T12: 05: 09.517395-05: 00 mznaplapipt002 bash[63729]: Error: the inet prefix is ​​expected rather than "requests".
2019-05-15T12: 05: 09.517444-05: 00 mznaplapipt002 bash[63729]: Error: the inet prefix is ​​expected rather than "Too".
2019-05-15T12: 05: 09.517506-05: 00 mznaplapipt002 bash[63729]: Error: the inet prefix is ​​expected rather than "many".
2019-05-15T12: 05: 09.517569-05: 00 mznaplapipt002 bash[63729]: Error: the inet prefix is ​​expected rather than "requests".
2019-05-15T12: 05: 09.517631-05: 00 mznaplapipt002 bash[63729]: Error: the inet prefix is ​​expected rather than "many".
2019-05-15T12: 05: 09.517709-05: 00 mznaplapipt002 systemd[1]: Started updating the cloud-netconfig configuration.
2019-05-15T12: 05: 09.517936-05: 00 mznaplapipt002 bash[63729]: Error: the inet prefix is ​​expected rather than "requests".
2019-05-15T12: 05: 09.518003-05: 00 mznaplapipt002 bash[63729]: Error: the inet prefix is ​​expected rather than "Too".
2019-05-15T12: 05: 09.518055-05: 00 mznaplapipt002 bash[63729]: Error: the inet prefix is ​​expected rather than "many".
2019-05-15T12: 05: 09.518146-05: 00 mznaplapipt002 bash[63729]: Error: the inet prefix is ​​expected rather than "requests".
2019-05-15T12: 05: 09.518232-05: 00 mznaplapipt002 bash[63729]: Error: the inet prefix is ​​expected rather than "many".
2019-05-15T12: 05: 09.518295-05: 00 mznaplapipt002 bash[63729]: Error: the inet prefix is ​​expected rather than "requests".