The Avamar upgrade from 19.10.0-135 to 19.10.0-166 fails when the MCS hotfix is installed
Summary: The Avamar upgrades from 19.10 GA (19.10.0-135) to 19.10 SP1 (19.10.0-166) fail if the new Management Console Server cumulative hotfix is already installed.
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Symptoms
The upgrade package is rejected with the message that the package version is incorrect.
Cause
New Management Server Console (MCS) hotfixes (from 338839) are based on 19.10.0-166 SP1, as no patch branch exists for 19.10.0-135. These hotfixes are compatible and can be applied as callable to both the 19.10.0-135 and 19.10.0-166 Avamar servers. However, when applied to a 19.10.0-135 server, the MCS version is upgraded to 19.10.0-166, while the GSAN version remains as 19.10.0-135.
Applying a 19.10.0-166 SP1 hotfix to 19.10.0-135 servers causes upgrade rejection due to matching MCS and target Avamar Installer (AVI) versions.
Resolution
To upgrade the Avamar Server from 19.10.0-135 to 19.10.0-166 SP1, avoid installing any hotfixes generated from the 19.10.0-166 SP1 branch beforehand. Instead, perform a direct upgrade to 19.10.0-166 SP1 and apply the latest callable MCS cumulative hotfix to receive all current fixes.
Affected Products
Avamar ServerArticle Properties
Article Number: 000242572
Article Type: Solution
Last Modified: 05 Aug 2025
Version: 3
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