Hi Denis,
may be this helps:
4.2.2 REMOVE action
This action removes an instance of a business object from a reference list of another object. The
syntax is as follows:
REMOVE AttributeIdentifier() FROM AttributeIdentifier()
where the first Attribute Identifier indicates the object to remove and the second one –
the list to remove from. For example,
REMOVE Transaction FROM Account.Transactions
Regards,
Peter