Bug: Reports - block duplication not working, JavaScript error

OSIRIS v1.8.0-260201

Behavior: in reporting builder, if a block is duplicated, a JS is raised and no duplication appears.

<img width="1322" height="541" alt="Image" src="https://github.com/user-attachments/assets/e25bf830-af0b-4b4d-b525-c1dfcfde0fdd" />