Can't import/duplicate, only sometimes (Joomla)

Error

• With a new slider the import and duplicate option works once, then it doesn't, but after a while it does again.

Solution

If you have full version Admin Tools extension, then it has a .htaccess Maker. Between the settings there is a Set default expiration time to 1 hour option, which does, that it saves down the redirection of something, that you clicked on. This is causing, that our clicking on import or duplicate → create a slider with a new id, in this example it will be 10 → go to slider with the id 10, will be changed to clicking on import or duplicate → go to slider with the id 10, so the middle steps are skipped, it won't create a new slider, and it will just redirect to your previously created slider. You should turn this option off, and it will be fine.