Table is not getting updated

It might be possible that the primary key is not getting fetched in the output of the 1st write node. Please share the error if you need further support.

1. Are you sure that you are capturing the output of the first node and then setting the foreign key in the 2nd CDT?

2. If these are Records, have you considered using write related records? docs.appian.com/.../manage-record-data.html

The output of the 1st write-to records must return multiple outputs which might be the cause of this error. Please check all Activity class parameters that they do not return multiple outputs.