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The file is corrupted:
"""
jcea@ubuntu:/tmp/z$ /usr/local/BerkeleyDB.5.3/bin/db_verify data.db 
db_verify: BDB0551 Page 0: nonsensical free list pgno 55
db_verify: BDB1107 Page 2: offpage item 19 has bad pgno 70
db_verify: BDB1107 Page 20: offpage item 5 has bad pgno 59
db_verify: BDB1107 Page 36: offpage item 9 has bad pgno 94
db_verify: BDB1107 Page 37: offpage item 9 has bad pgno 57
db_verify: data.db: BDB0090 DB_VERIFY_BAD: Database verification failed
BDB5105 Verification of data.db failed.
"""
For "real world" usage, you must use Berkeley DB transactional storage mode. If you use a concurrent datastore or anything like that (anything more "simple" that the transactional mode), you can corrupt your database if the application or the computer crash in a bad moment. Or if you try to backup the database while writes are in progress, for instance. Briefly: use the transactional mode and read the Oracle documentation carefully!.
Closing the report as invalid, since the database is actually corrupt.