Application Express :: Automated Row Fetch 

I have a form based on a table where i have 2 keys as primary key (col1,col2)==>composite pk. sample values are like:

col1 col2
1 21
2 21
62 21
62 1

But issue is at the point where the automatic row fetching is getting executed [Automated Row Processing section on edit page] Primary column value is col1(only one column is allowed in apex Auto row fetch) Secondary key column is col2.

For ex, when i access the row for col1=62, it fetches 2 rows where value=62 (based on col1) and i get error; (exact fetch returns more than 1 row)

How to avoid this