Duplicate column name 'slider_status'
Duplicate column name 'slider_status' ALTER TABLE `[prefix]_nextend2_smartslider3_sliders` CHANGE `status` `slider_status` VARCHAR(50) NOT NULL DEFAULT 'published'
This issue happens, when you install the latest version of Smart Slider -> then downgrade it to a lower version -> update Smart Slider again to the latest version. Maybe some wrongly configured server cache can create this issue as well, in case you haven't done this process.
In the latest Smart Slider within the
[prefix]_nextend2_smartslider3_sliders database table we renamed the
status column to
slider_status. When you install an older Smart Slider version, that creates the
status column, when it doesn't exists. Then the latest Smart Slider would try to rename
slider_status again, just it can't, because
slider_status already exists.
[prefix]_nextend2_smartslider3_sliders database table, delete the