[info] [<0.139.0>] 127.0.0.1 - - POST /_replicate 400
[info] [<0.172.0>] Replication `"ffaf5a95a6a1d309271b60dbc03c0b02+create_target"` is using:
	4 worker processes
	a worker batch size of 500
	20 HTTP connections
	a connection timeout of 30000 milliseconds
	socket options are: [{keepalive,true},{nodelay,false}]
	source start sequence 83
[info] [<0.140.0>] starting new replication `ffaf5a95a6a1d309271b60dbc03c0b02+create_target` at <0.172.0> (`http://isaacs.ic.ht/registry/` -> `registry`)
[error] [<0.193.0>] Replicator: ignoring document with empty ID in source database `http://isaacs.ic.ht/registry/` (_changes sequence 3518)