using mysqlsh migrate mysql from local instance to rds

[CHEN XU]

old version:5.7.35
rds version:5.7.38

i use util.dumpSchemas to backup local schema ,then i load backup use bellow command util.loadDump("/mydumper/backup/dw",{schema:'dw_test',threads:8,'ignoreVersion':'True'

but i got this "

Target is MySQL 5.7.38-230101-log. Dump was produced from MySQL 5.7.35-log
ERROR: [Worker006]: Query returned fewer rows than expected
ERROR: [Worker002]: Query returned fewer rows than expected
Checking for pre-existing objects...
ERROR: [Worker007]: Query returned fewer rows than expected
ERROR: [Worker004]: Query returned fewer rows than expected
ERROR: [Worker005]: Query returned fewer rows than expected
ERROR: [Worker000]: Query returned fewer rows than expected
ERROR: [Worker003]: Query returned fewer rows than expected
Executing common preamble SQL
ERROR: [Worker001]: Query returned fewer rows than expected
No data loaded.
Total duration: 0 sec
8 errors and 0 warnings were reported during the load."

what does this mean " Query returned fewer rows than expected",how can I get more detail about this?