Upgrade to NVBU 12 fails with: Error renaming ..NetVault Backup/pgsql_new to ..NetVault Backup/pgsql (4044714)

Upgrade to NVBU 12 fails with: Error renaming ..NetVault Backup/pgsql_new to ..NetVault Backup/pgsql

While upgrading the NetVault Backup server to NVBU version 12 the following pop up message is displayed and the upgrade fails:

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Error

There has been an error.

Error renaming ..NetVault Backup/pgsql_new to ..NetVault Backup/pgsql

The application will exit now.

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NetVault is not upgraded and the older version remains.

While the NetVault service may be started, login to the Web UI fails.

The bitrock_installer*.log generated in the Windows Temp folder shows that the upgrade fails during the PostgreSQL upgrade phase.

The pg_upgrade command exits with:

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Cannot delete file E:/Program Files (x86)/Dell/NetVault/pgsql

[xx:xx:xx] installationAbortedActionList: begin

[xx:xx:xx] installationAbortedActionList: end

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