An individual unit needing to purge its own memories shouldn't have any bearing on the central database.  Assuming there is one to which they can refer.

[And if they are having trouble coming to a consensus, there may not be.  That or the database itself is somehow incomplete, to say nothing of the fact that Emet's experience is with Allagan technology, which these are not, for all they might be similar in function.]

Still, if the memories are connected enough for one to be mentioned in the stories of the others, I see no reason the data on this initial "He" shouldn't exist somewhere.