Description
If we edit the article again and use the old slug value should not be saved again with the old slug value.
How to reproduce
Step 1: Go to the article, create an article and save:


Step 2: Create again new article with the same slug value as the old article and here show a warning:


This is correct so here use the new slug value to save with the article status published:

Step 3: Now again go to the article option:

Now edit the 2nd article again, edit slug value again with the old slug value (art1), and here is not showing a warning:

Possible Solution
If we edit the article again and use the old slug value should be shown a warning:
