Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.
When category is edit, The Magento shows this message error.
for URL Rewrite Go to Magento admin
In the Left-hand menu section click Marketing >> SEO & Search >> URL Rewrites
Click edit for changing desired URL rewrite
Change URL accordingly and execute indexing command
php bin/magento indexer:reindex
Required, but never shown