Rudder

And not in the "service pack" field (see screenshot).

Inventory looks like:

    <OPERATINGSYSTEM>
      <ARCH>x86_64</ARCH>
      <BOOT_TIME>2020-02-25 12:35:34</BOOT_TIME>
      <DNS_DOMAIN>xxxxx</DNS_DOMAIN>
      <FQDN>xxxxxxx</FQDN>
      <FULL_NAME>SUSE Linux Enterprise Server 15 SP1</FULL_NAME>
      <HOSTID>xxxxxxxx</HOSTID>
      <KERNEL_NAME>linux</KERNEL_NAME>
      <KERNEL_VERSION>4.12.14-197.29-default</KERNEL_VERSION>
      <NAME>SuSE</NAME>
      <SERVICE_PACK />  
      <SSH_KEY>ssh-rsa xxxxxxx
      <TIMEZONE>
        <NAME>Europe/Paris</NAME>
        <OFFSET>+0100</OFFSET>
      </TIMEZONE>
      <VERSION>15-SP1</VERSION>
    </OPERATINGSYSTEM>

os release is similar than for sles 12 (which is ok):

# cat /etc/os-release
NAME="SLES" 
VERSION="15-SP1" 
VERSION_ID="15.1" 
PRETTY_NAME="SUSE Linux Enterprise Server 15 SP1" 
ID="sles" 
ID_LIKE="suse" 
ANSI_COLOR="0;32" 
CPE_NAME="cpe:/o:suse:sles:15:sp1" 

# cat /etc/os-release
NAME="SLES" 
VERSION="12-SP4" 
VERSION_ID="12.4" 
PRETTY_NAME="SUSE Linux Enterprise Server 12 SP4" 
ID="sles" 
ANSI_COLOR="0;32" 
CPE_NAME="cpe:/o:suse:sles:12:sp4"