Error on DeleteRows note type

I am trying to upsert a CSV file into an already existing Dataset. I have probably loaded several hundred files wit Dataset Utils. The latest file I need to be upserted fails on the deleterows node. Here is the full error description : "Something went wrong while executing the deleterows node: signal:aborted (Core dumped).
I have tried creating a new dataset, and do an upsert with the same file that is failing, and I am able to upsert it successfully. Also I took the same file and successfully upserted into a Full sandbox containing the same dataset as in Prod.
Also in prod I just took one record a from the new file and tried to upsert it unsuccessfully. Another thing I tried was to take a record that was successfully inserted in the past, and I tried to upsert it but got the same error as above. This makes me thing, there is something wrong with my dataset. Any ideas on what to look at would be greatly appreciated.
Thanks