IP addresses of the imported Plesk subscriptions are not leased from the corresponding IP pools during the import process.
As a result, when a new Plesk subscription is created it can receive an IP address that is used already by another subscription and therefore one of those subscriptions can become unreachable.
Such behavior was classified as the software issue PBAS-16535 and will be fixed in future OBAS releases.
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Knowledge base, each product update comes with corresponding KB article.
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