If a: * hard-coded entry or * config entry, tries to add: * an authority, * a bridge authority, or * a fallback directory, with the same: * relay key, * v3ident key, * IPv4 address and ORPort (matching any other IPv4 address and port), or * IPv4 address and DirPort (matching any other IPv4 address and port), * IPv6 address and ORPort (matching any other IPv6 address and port), or * IPv6 address and (IPv4) DirPort (matching any other IPv6 address and port), as an existing entry, tor should warn and refuse to start.