Need help to resolve - "Data being updated does not exist. (18,4) "

Hello Gurus

I am facing this problem for the past few days and unable to find an optima solution yet. I was close when i got this error - Data being updated does not exist. (18,4)

Issue : I have to delete the level 1 rows (Parent rows) when all its child rows are deleted.

Component structure is : Level 0 and Level 1 are the same records. Level 1 is keyed additionally by EFFDT

                                     Level 2 contains all Level 1 keys with one more extra key

Below is the sample code that I have written on saveprechange of the component level 0 record.

&rs1 = GetLevel0()(1).GetRowset(Scroll.Level1Record);