How to fix the Oracle error CLSGN-00143: Subdomain “string” already exists.?

In this post, you’ll learn more about the Oracle ErrorCLSGN-00143: Subdomain “string” already exists. with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

CLSGN-00143: Subdomain “string” already exists.

Reason for the Error CLSGN-00143: Subdomain “string” already exists.

An attempt was made to create a GNS subdomain which already exists.

How to fix the Error CLSGN-00143: Subdomain “string” already exists. ?

You can fix this error in Oracle by following the below steps

Specify a subdomain which does not exist.