How do I add two Battle.net accounts with the same email but in different regions?

[k99k5]

Describe the bug
How do I add two Battle.net accounts with the same email but in different regions?
The latest version keeps overwriting the same record.

Additional context
Battle.net.config

{
    "Client": {
        "Version": {
            "FirstRun": "false",
            "Release": {
                "FirstRun": "false",
                "LastBuildVersion": "14956",
                "LastSeenPatchNotesVersion": "14956",
                "CriticalPatchSeqn": "4"
            },
            "BetaOptIn": "false",
            "Beta": {
                "LaunchFlag": "false",
                "FirstRun": "false",
                "LastBuildVersion": "14133",
                "ExitFlag": "false",
                "LastSeenPatchNotesVersion": "14133"
            }
        },
        "Toasts": {
            "ScreenPosition": "BottomRight",
            "Monitor": "0"
        },
        "GaClientId": "GA1.2.1746406592.1656689779",
        "AutoLogin": "true",
        "SavedAccountNames": "**SAME EMAIL**",
        "GameSearch": {
            "PerformedSearch": "true"
        },
        "Install": {
            "DefaultInstallPath": "G:\/",
            "DownloadLimitNextPatchInBps": "0",
            "DownloadLimitInBps": "0",
            "PauseUpdatesWhenLaunching": "false"
        },
        "Voice": {
            "InputDevice": "Default System Device",
            "TransmissionType": "0",
            "OutputDevice": "Default System Device",
            "OutputVolume": "100"
        },
        "HotKey": {
            "HotKeyActionToggleMute": ""
        },
        "SingleInstance": "true",
        "AppearOffline": {
            "LastNotificationMS": "0",
            "IsNotificationSeen": "true"
        },
        "Shop": {
            "SaleNotificationVersionClicked": "6"
        },
        "HighDpi": {
            "HighDpiSupported": "false",
            "HighDpiEnabled": "true"
        },
        "WelcomeArticle": {
            "LastSeenSequenceId": "2"
        },
        "RememberAccountName": "true"
    },
    "57de7d689ce230e7": {
        "Client": {
            "Language": "zhCN",
            "LoginSettings": {
                "AllowedRegions": "CN;US;EU;KR;",
                "AllowedLocales": "zhCN"
            }
        },
        "Path": "D:\\Program Files\\Battle.net",
        "Services": {
            "LastLoginAddress": "cn.actual.battlenet.com.cn",
            "LastLoginRegion": "CN",
            "LastLoginTassadar": "account.battlenet.com.cn"
        }
    }
}

diff：

 "57de7d689ce230e7": {
        "Client": {
            "Language": "zhCN",
            "LoginSettings": {
                "AllowedRegions": "CN;US;EU;KR;",
                "AllowedLocales": "zhCN"
            }
        },
        "Path": "D:\\Program Files\\Battle.net",
        "Services": {
            "LastLoginAddress": "cn.actual.battlenet.com.cn",
            "LastLoginRegion": "CN",
            "LastLoginTassadar": "account.battlenet.com.cn"
        }
    }

 "57de7d689ce230e7": {
        "Client": {
            "Language": "zhCN",
            "LoginSettings": {
                "AllowedRegions": "CN;US;EU;KR;",
                "AllowedLocales": "zhCN"
            }
        },
        "Path": "D:\\Program Files\\Battle.net",
        "Services": {
            "LastLoginAddress": "kr.actual.battle.net",
            "LastLoginRegion": "KR",
            "LastLoginTassadar": "account.battle.net"
        }
    }