Modification rejected by ACER as Trade doesn't exist (Missing Linked Order ID)

Modification rejected by ACER as Trade doesn't exist (Missing Linked Order ID)

Please ensure that the Linked Order ID has been provided within the submitted Modification.

As seen within the ACER System Data Validation document found at the below link:

REMIT Documents | www.acer.europa.eu

We can see that in Rule 2DLIATR3x the following definition "If  the  last  received  Trade  has  actionType  =  ‘M’  and  there  is  no  existing  Trade  with actionType=’N’    and    the    same    values    for    (buySellIndicator,    ContractID, OrganisedMarketPlaceID, UTI, idOfMarketParticipant, LinkedOrderIDand HasSubstring(field Extra, ‘FullSet’))then the last received Trade is INVALID."

If the Linked Order ID is present within the Accepted New submission but has not been completed within the Modification, this will be rejected by ACER with the error [R1LIATTRMOD] Received a Trade Modification for a Trade that doesn't exist in the system as detailed within the rule above.

In order to rectify this issue you will be required to resubmit the Modification with the amended Linked Order ID field.