You discover that the test environment database is not complete.
To copy the database, StageWare transfers "packages" of up to 10000 rows of the database table. The more rows bundled in a package, the faster the test environment setup is completed.
However, depending on the contents of the database table, it is possible that the package of 10000 rows exceeds the allowed value "max_allowed_packet" of your MySQL server. These packages are then not imported, but rejected by your MySQL server and skipped. This is by far the most common cause of an incomplete database in a test environment.