Creating a Unique Partition ID with fdisk

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Message received:
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Can not back up /dev/sdb partition since /dev/sda partition has the same identifier.
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{color:blue}fdisk{color} does not correctly write the partition ID when partitioning a disk.
{info:title=Note}CDP requires all partitions to have a unique ID even if the partition has not been selected as a Device in the Disk Safe for replication.
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A unique partition ID must be created.
{note:title=Warning}This is a dangerous operation. Make sure all data has been backed up *before* changing any partition information on your disk. A failure in changing partition data can make the machine unbootable.
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{info:title=Note}Some operating systems such as RHEL 5 and Centos use an older version of fdisk contained in the util-linux package, which does not include the ability to change the partition identifier. The util-linux package has been replaced in more updated operating systems with the util-linux-ng package. In these cases you would need to manually upgrade the fdisk utility.
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# fdisk /dev/sdb (enter the correct disk identifier assigned by Linux)