Comment 5 for bug 308048

OK, I have retested this. Yes, adding a new constraint works just fine. The bug occurs when you delete the blank line that appears when you add a Predicate on the preceding line. So:

1. Add a Constraint as normal
2. Delete the blank lines below the lowest constraint
3. Try to add another

Not even editing the previous line and tabbing through creates a new line. The debug log said "ERROR:Object already has no line number so not deleting."

I suspect this kind of error might be present in a few of the other tables.