Prevent item list lines deletion / duplication

0

Hi all, I am quite new to webcon and I came over this.
We have a form with a item list. The item list is initialized from external source. It shall represent a log file for some measured values.
The lines in the item list shall be every 10 minutes, so I initialize the list with 100 x 10 minutes line.

Hence, the user shall not be able to delete or duplicate records / lines from the item list.

How can I achieve that? Until now I found editability in field matrix, but how can I prevent users from deleting and duplicating lines?

Best regards

Lutz