During upgrade, database raised exception 211

I had... 

During upgrade, database raised exception 211, severity 23, state 46, address 019C646E. Use the exception number to determine the cause.

The cause was pretty dark, so to diagnose, I tried to restore the database using the hard way.

(2 row(s) affected)

Processed 4624 pages for database 'THEDATABASE', file 'THEDATABASE' on file 1.

Processed 1 pages for database 'THEDATABASE', file 'THEDATABASE_log' on file 1.

Converting database 'THEDATABASE' from version 539 to the current version 611.
Database 'THEDATABASE' running the upgrade step from version 539 to version 551.
Database 'THEDATABASE' running the upgrade step from version 551 to version 552.
Database 'THEDATABASE' running the upgrade step from version 552 to version 553.
Database 'THEDATABASE' running the upgrade step from version 553 to version 554.
Database 'THEDATABASE' running the upgrade step from version 554 to version 589.
Database 'THEDATABASE' running the upgrade step from version 589 to version 590.
Database 'THEDATABASE' running the upgrade step from version 590 to version 593.
Database 'THEDATABASE' running the upgrade step from version 593 to version 597.
Database 'THEDATABASE' running the upgrade step from version 597 to version 604.
Database 'THEDATABASE' running the upgrade step from version 604 to version 605.
Database 'THEDATABASE' running the upgrade step from version 605 to version 606.
Database 'THEDATABASE' running the upgrade step from version 606 to version 607.
Database 'THEDATABASE' running the upgrade step from version 607 to version 608.
Database 'THEDATABASE' running the upgrade step from version 608 to version 609.
Database 'THEDATABASE' running the upgrade step from version 609 to version 610.
Database 'THEDATABASE' running the upgrade step from version 610 to version 611.
RESTORE DATABASE successfully processed 4625 pages in 29.687 seconds (1.276 MB/sec).