Exchange number is a required entry for document type &

What causes this issue?

Exchange number is required for posting a LIA using document type &v1&.

System Response

The LIA document type determines whether the Exchange number is
required. LIA document types can be configured using a customizing
transaction found from the Exchanges Customizing Menu -> Transactions
-> LIA -> LIA Document Types.

How to fix this error?

Enter an exchange number for this LIA.

Error message extract from SAP system. Copyright SAP SE.