Hey, @xluckly is this still a block for you?
You should follow what I have said or try to lease more UIDs before loading the previous data with fixed UIDS. You should do:
/assign?what=uids&num="10000000000"
Until you have the same amount of UIDs leased in the previous cluster.
See more at https://dgraph.io/docs/deploy/dgraph-zero/#more-about-state-endpoint
Cheers.