Postings exist in ledger &1

What causes this issue?

Changes to the ledger can lead to data inconsistencies. If you need to
change the underlying ledger of an extension ledger, it might be a good
idea to delete the extension ledger, save your changes, and then create
the extension ledger again with the correct underlying ledger. This will
make sure that the extension ledger has consistent customizing settings
for the company codes assigned to the ledger.

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?

INCLUDE CUSTOMIZED_MESSAGE_INFO OBJECT DOKU ID TX

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.