The automation will create a new issue in another project.
This new issue requires some mandatory fields which we dont have in the original issue and they will need to be manually imputed as they will be different for each issue.
Hi @POLYXENI ATHIENITOU and welcome to the community!
One option is to populate the mandatory fields as part of the create issue action with some placeholder data. Then on the target project's workflow, you could add a validator where custom field != <your placeholder data>. This will ensure the new issue is successfully created and forces the assignee of the new issue to address the mandatory fields prior to transitioning the issue to the next status.