3781000 - Error "IP ranges could not be saved" when saving Trusted IPs in SAP Datasphere

Error "IP ranges could not be saved." happens right after clicking "Save" button after adding an IP address in Datasphere -> System App -> Configuration -> Tab "IP Allowlist" -> "Trusted IPs".

In Network trace, there is error:
Request URL https://<TENANT_URL>.XXXX.hcs.cloud.sap/dwaas-core//security/ipallowlist
Request Method POST
Status Code 409 Conflict

with Response

{
    "code": "scpRequestInProgress",
    "details": {
        "stack": "See correlation id XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX"
    }
}

SAP Datasphere 

Last saving process is still on going.

Wait for some minutes. SAP Datasphere's IP Allowlist works as designed. 

Refer to the disclaimer note:

"Opening the allowlist or updating it in the database after saving changes or new entries requires some time. 
To check if your changes have been applied, refresh the list..."

After clicking "Save" button, there is a prompted message "Your change has been scheduled.".
This means that a job to update the IP Allowlist was requested and until is finished it's not possible to add/delete entries.

If you attempt to add/delete and save changes while the job is still pending, it will raises the error "IP ranges could not be saved.".
That is expected and correct behavior because there is still a pending job which needs to be finished, for then a new update request be scheduled.

Normally the update process should take a few minutes.

SAP Datasphere Help Manage IP Allowlist

KBA , DS-PROV , DWC Provisioning , Known Error