Duplicate key column (%1)

Error constant SQLE_DUPLICATE_KEY_COLUMN
ODBC 2 State 37000
ODBC 3 State 42000
Parameter 1 The name of the duplicate column.
Severity 16
SQLCODE –1085
SQLSTATE 42WC0
Sybase error code 13429
Probable cause

You supplied a duplicate column name in the list of columns for the key of a primary key, foreign key, or unique constraint, or an index.