audit message on shutdown

[Davide Bolcioni]

Greetings,
I have been seeing an elusive message on shutdown, along the lines of

audit(...) user uid=0 auid=4294967295 subj=system_u:system_r:hwclock_t:s0 
msg='changing system time ... res=success)'

and apparently harmless, since the clock is running ok on subsequent boot (but
I am using NTP). Is it safe to ignore this or should I dig deeper ?

Thank you for your consideration,
Davide Bolcioni
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