Problem use case (with up to date 5.8): 1. import statement (for simplicity, with a single entry) 2. in account statement origins, add a line to a wrong account and validate (not post) 3. now click on the trash can to delete the line [note here that one cannot add a line, oups, forgot to set back to 'draft'] 4. click on cancel, then draft, in order to be able to add the correct line 5. then validate the move created in 2 is still there and must be located somehow in order to delete it. BUG: it should not be possible to modify origins' lines once validated