Misleading error message for BURs with duplicate lines

[HeeroWingZero]

When a duplicate line is detected in a BUR the error that shows up says that the implication already exists even if it doesn't yet. See the following that I got when I accidentally had a duplicate line in an Apex skin BUR:

Similarly, a duplicate line in an implication removal says that the implication doesn't exist, even though it does:

Have not tested with aliases/renames/deprecations/etc, but I'd assume the same error pops up. These should probably be changed to say that a duplicate line was detected in the BUR, rather than erroneously reporting that the action was already completed.