Unable to start specified database: The transaction log '%1' or its mirror '%2' is invalid

Error constant SQLE_CORRUPT_REDO_OR_MIRROR
ODBC 2 State 08001
ODBC 3 State 08001
Parameter 1 The name of the transaction log file.
Parameter 2 The name of the transaction log mirror file.
Severity 11
SQLCODE –1009
SQLSTATE 08W73
Sybase error code 840
Probable cause

The transaction log differs from the transaction log mirror. Either the transaction log or its mirror is invalid.