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MS Dynamics 365 Business Central API Deltalink does not work

Business Central API deltalink does not work as expected, I have created an custom API in business Central to test the deltalink functionality,

to enable the deltalink , ChangeTrackingAllowed property is set down true in business central API,

And have done the Service to Service authentication to check API response in postman,

1) When I send get request to call the API , I got the expected response along with Deltalink

2) And when I was used that deltalink for sub sequential request to get changes records ony , it gives internal Server error, deltalink seems not be worked,

Kindly help me to figure it out that what extra setups needs to be done to start work deltalink functionality as per Microsoft document.

https://docs.microsoft.com/en-us/dynamics365/business-central/dev-itpro/developer/devenv-connect-apps-delta

My business Central API,

page 50126 DeltaLinkUS

{

PageType = API;

EntityName = 'IkanoUS';

EntitySetName = 'IkanoUS';

Caption = 'IkanoUS';

APIGroup = 'Ikano';

APIPublisher = 'US';

APIVersion = 'v2.0';

ApplicationArea = All;

UsageCategory = Lists;

SourceTable = "Delta Link Testing Table";

DelayedInsert = true;

ChangeTrackingAllowed = true;

ODataKeyFields = SystemId;

Permissions = tabledata 50126 = rimd;

InsertAllowed = true;

DeleteAllowed = true;

ModifyAllowed = true;

layout

{

area(Content)

{

repeater(Control)

{

field(id; rec.SystemId)

{

ApplicationArea = All;

}

field(TrackingCode; rec."Tracking Code")

{

ApplicationArea = All;

}

field(TrackingName; rec."Tracking Name")

{

ApplicationArea = All;

}

2) Response from BC API with Deltalink:

3) When I use above deltalink in next get request , I received internal server error 500

Could you please help me to figure it out issue , and what setups needs to be done business Central and azure portal, where have I registered BC app for service to service authentication,

Kindly suggest investigation area , and how can I fix this issue.

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