4.1.2 Notes on new installation

• You cannot install JP1/DH - Server in an environment in which PostgreSQL is already installed. Uninstall PostgreSQL first, and then install JP1/DH - Server.

• You cannot install JP1/DH - Server in an environment in which the postgres user exists. Delete the postgres user, and then install JP1/DH - Server.

  In Linux, also delete the home directory of the postgres user. Before deleting the home directory, check the contents in it and save the necessary files, if any.

• To install JP1/DH - Server again after uninstalling it, either delete the installation folder or empty the folder before re-installation.

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