Imagine a situation, when on your Source CRM (the one you are migrating from) you have an Attachment connected to the Note (it’s just an example - it can be any module). And you want to migrate these modules together with relation between them to the Target CRM. But, the future CRM does not support such relation (due to the specifics of the platform).
So, in this case, our system looks for an Opportunity (for ex.) that is connected to this Attachment and Note and migrates the modules all together - Attachment, Note and Opportunity to the Target CRM. But, on the Target platform the Attachment is connected to the Opportunity, and not to the Note (because such a relation is not supported here).
Check out the scheme for better understanding:
