SQL Server 2016 Replication Error while Configuring Diistributor

I am trying to configure Distributor for transactional replication set up on SQL 2016 Enterprise Edition server. But I get the following error:

SQL Server could not configure ‘Server01’ as a Distributor.

An exception occurred while executing a Transact-SQL statement or batch. (Microsoft.SqlServer.ConnectionInfo)

The server principal ‘distributor_admin’ already exists.
Changed database context to ‘master’. (Microsoft SQL Server, Error: 15025)

Any help/direction to resolve this error would be highly appreciated.

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Author: SQLQuest