How to fix SAP error AR191?

What causes this issue? The first 2 characters of the VAT registration number do not correspond to the country's ISO code.System Response The system issues an error message and will not allow you to continue with this transaction until the error is resolved. How to fix this error? Check the entry. If necessary, check whether the ISO code of the country has been defined correctly.Error message extract from SAP system. Copyright SAP SE.

How To Fix AR191 - ISO code & is not correct in the VAT registration number

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AR191 - Overview

Message type: E = Error
Message class: AR - SSRV function module messages
Message number: 191
Message text: ISO code & is not correct in the VAT registration number
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What causes this issue?
The first 2 characters of the VAT registration number do not correspond
to the country's ISO code.
System Response
The system issues an error message and will not allow you to continue with this transaction until the error is resolved.
How to fix this error?
Check the entry.
If necessary, check whether the ISO code of the country has been
defined correctly.

Error message extract from SAP system. Copyright SAP SE.

AR191 - Details

Error Code: AR191
Error Message: ISO code & is not correct in the VAT registration number

Summary
This error indicates that the ISO country code included in the VAT registration number is invalid or incorrectly entered. The system expects a valid two-character ISO code at the beginning of the VAT number, but it found an incorrect or unexpected character instead.

Root Causes
The VAT registration number entered contains an invalid or misspelled ISO country code.
Master data for the vendor/customer or company code has incorrect VAT number formatting.
System configuration for allowed ISO codes in VAT numbers is incomplete or outdated.
User input error when manually entering or updating VAT registration numbers.
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