Android :: SQLite - Can't Prevent Duplicating Entries

I would like to create a table to store device settings. The table has three rows: id, parameter_name and parameter_value. The table was created by executing the following query statement: DATABASE_CREATE = "create table DATABASE_TABLE (KEY_ID INTEGER PRIMARY KEY AUTOINCREMENT, KEY_NAME INTEGER not null, VALUE TEXT not null); and then the rows are stored by executing the following method:

private long insertRow(int rowParameter, String rowValue, SQLiteDatabase db){
long res = -1;
ContentValues settingsParameterValues = new ContentValues();
settingsParameterValues.put(KEY_NAME, rowParameter);
settingsParameterValues.put(VALUE, rowValue);...................

The problem with method insertRow() however is that it can't prevent duplicating the entries. Does anyone know how to prevent duplicate entries in this case?