Thanks. That makes sense. Can the ID be manually changed. I use desktopserver and If the ID can be the same in a gutenberg block than I can push the block onto the live site with WPsitesync. At the moment I cannot do that becuase the shortcode would be wrong. I know I can go ont to the live site anyway but was looking for a way that would ensure no conflict when “pushing” content.
By the way. I think Simply is vary good. I have used other gallery s/w and nothing is as fast and effective.