Index name '%1' not unique

Error constant SQLE_INDEX_NAME_NOT_UNIQUE
ODBC 2 State S0011
ODBC 3 State 42S11
Parameter 1 Name of the invalid index.
Severity 16
SQLCODE –111
SQLSTATE 52W04
Sybase error code 1921
Probable cause

You attempted to create an index with the same name as an existing index.