table for related materials attachments- on offering

Summary:

Content (please ensure you mask any confidential information):

hi team,

on duplicate an offering-

there is a problem that the  related materials attachments doesn't exist on the duplicatd offering.

what I want to do is to find the id of the document by having the offering -item_id/number,

but I cannot find any table that show the related materials of an offering.

any idea will help me!

thank you in advance!

(by the way, if you have any idea to solve the first problem - will be even better for me)

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