An exchange type is required for all LIA postings.

What causes this issue?

Exchange type has not been entered.

System Response

If you enter a valid exchange number, the exchange type is
automatically defaulted. However, if an exchange number is not required
(based on LIA doc. type) and has not been entered, then it is defaulted
to 'LIA' and an exchange type must be entered.

How to fix this error?

Enter a valid exchange type.

Error message extract from SAP system. Copyright SAP SE.