### CONTEXT (Previous Events):
<system_output timestamp="1546.68785">I: Configuring libtirpc3:i386...
</system_output>
<system_output timestamp="1546.770971">I: Configuring libnftables1:i386...
</system_output>
<system_output timestamp="1546.823441">I: Configuring nftables...
</system_output>
<system_output timestamp="1547.146957">I: Configuring iproute2...
</system_output>
<system_output timestamp="1547.441119">I: Configuring isc-dhcp-client...
</system_output>
<system_output timestamp="1547.571421">... [TRUNCATED TO SAVE SPACE] ...</system_output>
<system_output timestamp="1548.033889">... [TRUNCATED TO SAVE SPACE] ...</system_output>
<system_output timestamp="1548.284062">... [TRUNCATED TO SAVE SPACE] ...</system_output>
<system_output timestamp="1548.323587">... [TRUNCATED TO SAVE SPACE] ...</system_output>
<system_output timestamp="1548.440109">I: Base system installed successfully.
</system_output>
<system_output timestamp="1548.682748">Creating base.tar.xz
</system_output>
<system_output timestamp="1549.894126">Warning: no hostname for 172.16.0.17 found, not adding to /etc/hosts.
</system_output>
<system_output timestamp="1549.896379">'/etc/resolv.conf' -&gt; '/srv/fai/nfsroot/etc/resolv.conf-installserver'
</system_output>
<system_output timestamp="1549.898535">'/etc/resolv.conf' -&gt; '/srv/fai/nfsroot/etc/resolv.conf'
</system_output>

### TARGET LINE (Extract and Classify THIS Timestamp):
<system_output timestamp="1549.900047">Upgrading /srv/fai/nfsroot
</system_output>

Answer: 1549.900047, old event