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Create a pointer record (PTR) for reserved public IP address

User_9AEGLNov 14 2020

I need to create a pointer record (PTR) for a reserved public IP address provided by Oracle.
I checked article Setting Up Reverse DNS Zones in Oracle Cloud Infrastructure Documentation.
I attempted to create the reversed DNS zone following the instructions provided in that article, but I receive the following error message:
Authorization failed or requested resource already exists.
For example, let's say my reserved public IP address is I have already tried creating the following DNS zones: and But I receive the above error message.
I only need this for this particular record.

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Added on Nov 14 2020