Issue after Clearance done

Clearance is done with results 200 or 202 but after a few days some of our customers received emails with the following data
"
ونود إحاطتكم بأنه تم رصد عدد من الملاحظات على فواتيركم الإلكترونية، وذلك لعدم توافقها مع متطلبات المرحلة الثانية (الربط والتكامل) من الفوترة الإلكترونية.
وتتضمن هذه الملاحظات ما يلي:
· تكرر ارقام الفواتير المرجعية - رمز الاستجابة السريع - الرقم التسلسلي للفواتير - الرقم المرجعي العالمي
"
When contacting Zatca technical support for more details they send us an email with excel file has the following columns:
TIN
UC10_INVOICE_ID
UC10_ISSUE_DATE
UC10_UUID
UC10_INVOICE_HASH
UC10_CSID_SEQ
UC10_ISSUE
I can understand the data in the first 4 columns but I need help to understand the last two columns.

UC10_CSID_SEQUC10_ISSUE
2345701_UUID_MANY_IRN
2345701_UUID_MANY_IRN

I hope that anyone can explain to me where is the problem.

@EhabHamed it means there are multiple invoices (with different IRNs) shared where the UUID is exactly same. You must generate a new UUID for each document and ensure UUID is not repeated in any scenario

Thanks a lot for your response. But what UUID do you mean? Is it under cac:AdditionalDocumentReference ?

   <cac:AdditionalDocumentReference>
        <cbc:ID>ICV</cbc:ID>
        <cbc:UUID>10</cbc:UUID>
    </cac:AdditionalDocumentReference>  

By the way, we are using auto increment field value, I’m sure there is no duplicate for those values. The only fixed data is at “/ ubl:Invoice / cbc:UUID” where we are using the sending unit UUID.

@EhabHamed no there is another tag, search for UUID and you will find a value similar to below

cbc:UUID8d487816-70b8-4ade-a618-9d620b73814a</cbc:UUID>