Unable to update SQL in database picker

Summary:
User unable to update SQL in database picker

Steps to reproduce:
Using example from here: https://scriptrunner.adaptavist.com/latest/jira/script-fields/database-picker.html#_select_jira_project_example # Modify the example to use pkey instead of pname.

1. Preview works.
2. Click update to save the changes.
3. Edit again.
4. The changes are lost.

Outcome:
The changes are lost

Expected result:
SQL will be updated to latest changes