Record deletion through Import in excel


I have a table with unique key with 4 fields - they are the only fields in this table. And I have data entity for this table with 1 main ds and 3 child read-only ds (related to main by recIds).

Import and update through data management for this entity works perfectly, but when I try to delete record through Open in Excel functionality I get the error "The deletion of a row in data set XXX was not published. Error message: 'No resources were found when selecting for update.'". And the same when I'm updating the record in excel (as system doesn't update, actually, in this case, it creates new record and deletes the old one, and deletion causes error). I tried to override deleteEntityDataSource method on the entity to avoid this problem, but that didn't work. Could somebody help me to fix this issue, is it possible?

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