Review Journal - Deleting Transaction Lines

User attempted to delete a transaction line within the Review Journal and received the error message below. I’m still not certain if deleting the transaction is the solution here (more like a Cancellation and reapplying the records but fixing the mapping/affected GL Accounts) but that’s what they want to do. Any ideas?

Definitely wouldn’t delete from the RJ. Either go back to the document itself and delete it before posting (probably isn’t possibly for COS/WIP post tho), or fix whatever GL control issue was causing it.