It is an implication. Perhaps they had not taken into consideration the need for preserving such cells after they transferred themselves... and they may not have known how to reverse what they had already achieved. It is a lot of work...

[There's a slight pause. She's, perhaps, too familiar with such concepts, but it's interesting, to ... dissect these pieces.]

Or that it may have been too late to do so. The log you recited seemed to indicate... that the city and others were also under some duress, though there is a lack of when that is also involved.