Clearing not completed for all items, save this LIA and repeat the action

Message type: E = Error

Message class: O1 - IS-Oil : Message pool exchanges

Message number: 678

Message text: Clearing not completed for all items, save this LIA and repeat the action

You tried to clear an exchange balance.
The maximum number of items was reached. So the balance was not cleared
for all items.
Due to technical restrictions in the subsequent FI accounting document,
the maximum number of items is 499.

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

This is a warning and the document can still be posted.
Save this LIA document and repeat the balance clearing with the same
exchange in a new LIA document. The balance of the missing items will
be cleared.

Error message extract from SAP system. Copyright SAP SE.