MRBR- Release of Line items issue

Hi SAP Gurus

I have an issue with release of line items through MRBR:

1.I have multiple items in MRBR say 10,20,30 etc

2.Line item 10 turns yellow, meaning it can be released.

3.Once i select line item 10 of a PO, all other items (20,30) are also automatically getting selected.

I want to release only line item 10 but not 20 and 30.

Is there any config in this area ?

Thanking you in advance.

Dasaradh