I saved an intercompany journal entry and attempted to edit the entity name at the line level. However, I'm encountering an issue where I can't change the entity name. This problem persists in both the Sandbox environment and production. Can you help me understand what might be causing this issue?

Is it applied to another transaction as a "payment"? Most likely yes. Is the period still open for this JE? I am not sure if there's another way but I always had to unapprove the JE to break the link and make it editable again. And then just approve it again after making the change. I have not found another way to do it.