Duplicated Row ID in a joiner

Hi guys,

I am new to Knime, I took over the maintenance of a workflow for my company, and I have a issue with the duplicated row problem.

To be simple each line is adding a column with a stock info grouped by month, but it appears that for a product without a supply info, two row ID are created, and then I try to join the whole thing, I have the duplicated row message.

I don’t know how to fix it, and I am sure to don’t be clear at all right now… What info can I give you to have a clearer vision of the issue here ?

The way I solve the issue for the moment is to put a row filter and delete a full line of the row ID, not working for the long term.

The issue is random for the moment, it can appear on daily basis or not for a week.

I need your help guys !

Thank you,

Mat