Removing previous selected single select from a roster table item

[sham]

Hi Family,
I have two(variables) with the same value label but different data type
SECHQ1A= is a multiple select(Alpha)
SECHQ1AA= single select(numeric) but base on the response in SECHQ1A and also part of a roster but being part of a roster .
This is to say that I have generated a Setvalueset out of the selected options in SECHQ1A.
Now my problem now is how to remove the previous answer option in SECHQ1AA as i complete the roster so that i end the group in that table (SECTIONH000)
With your permission, I attached the sample application for more clarity showing all the logics that I have applied but still not there yet.
I will be glad for your assistant as usual.
Thank you.