Getting error while connecting domains to communication services

Question

i want to add a new domain to communication services. my domain is verified and valid to add in email communication service.in order to use communication service i need to add this but i am getting unwanted error

and this is api error

{
    "responses": [
        {
            "name": "6531279c-be9e-430c-af7e-7bcb8cdab059",
            "httpStatusCode": 400,
            "headers": {
                "Pragma": "no-cache",
                "x-ms-operation-identifier": "tenantId=fe6019ca-78a2-48a0-bb0c-bc24123d156f,objectId=d8454e75-ae24-4e10-b6bb-066716c02544/westindia/0a8db5e8-d977-47f7-a4ae-9cae5b67f6ed",
                "x-ms-providerhub-traffic": "True",
                "Request-Context": "appId=",
                "X-Content-Type-Options": "nosniff",
                "Strict-Transport-Security": "max-age=31536000; includeSubDomains",
                "MS-CV": "i5Gy/ZsqPEyOB61LH7WDyQ.0",
                "mise-correlation-id": "b03fcb5d-ed17-426c-adf1-f23d5ff7995c",
                "x-ms-failure-cause": "service",
                "x-ms-request-id": "c7a4b4dc-3714-4b2c-85ca-9c5fabcc3225",
                "x-ms-correlation-request-id": "6111fcb7-00dc-43cc-91c7-6e06e2f88907",
                "x-ms-ratelimit-remaining-subscription-writes": "199",
                "x-ms-ratelimit-remaining-subscription-global-writes": "2999",
                "x-ms-routing-request-id": "WESTINDIA:20250328T142937Z:4fae77dc-dcee-46c1-9397-0a0be868176d",
                "X-Cache": "CONFIG_NOCACHE",
                "X-MSEdge-Ref": "Ref A: 8B0004F04D444C11A963936D68F2C251 Ref B: MAA201060513037 Ref C: 2025-03-28T14:29:35Z",
                "Cache-Control": "no-cache",
                "Date": "Fri, 28 Mar 2025 14:29:37 GMT"
            },
            "content": {
                "error": {
                    "code": "RemoteResourcePatchFailed",
                    "message": "Remote CommunicationServices resource patch request failed with BadRequest"
                }
            },
            "contentLength": 133
        }
    ]
}

do someone know how to fix this error