If cPanel update failed with the following message;
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Fatal: Your RPM database appears unstable. It is not possible at the moment to install a simple RPM.
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The error is because of the corrupted RPM database. You can resolve this via the following steps;
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1. mkdir /root/old_rpm_dbs/
2. mv /var/lib/rpm/__db* /root/old_rpm_dbs/
3. rpm rebuilddb
4. Then run, #upcp –force
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Now cPanel update will complete successfully.
