check info before Syncing two Subforms

i have a secondary form that dumps its info into a master report. The secondary form has a subform and there is a corresponding subform in the main report

CASE:

Main form alreayd has ONE SAMPLE_ID listed on it

User submits on secondary form adding a new row, and a new SAMPLE_ID

GOAL:

When submitting, the code should look at the main form, see all the SAMPLE_IDs already listed on each row in the subform, and then add the new SAMPLE_IDs from the secondary form that are missing

so far, here is my code:

for each row in FetchID.Linked_Samples
{
SampleIDCollect.insert(row.Sample_IDs);
}
for each row in Linked_Samples2
{
if(!SampleIDCollect.ContainsValue(row.Sample_IDs2))
{
NewRow = Product_Form.Linked_Samples();
NewRow.Sample_IDs=row.Sample_IDs2;
NewRow.Factory=row.Factory2;
NewRow.Status=row.Status2;
FetchID.Linked_Samples.insert(NewRow);
}
}

The error i am getting is:

"Error at line number: 8

Variable SampleIDs2 does not exisit in ZC_SUBFORM_17"

SampleIDs2 exists in the SECONDARY form's subform. this error is telling me that it doe NOT exist in the MAIN form

i think deluge is getting stuck thinking that the "row" in line 8 still applies to the main form's subform (FetchID.Linked_Samples) , when really ive already closed that bracket and opened a new "for each row" which applies to Linked_Samples2 (the secondary form's subform)

I think this may be a deluge bug, but any other advice?