Customise changes won’t stay after multisite migration

Hi,

I recently managed to do a migration of a multisite almost completely, with the editing of the database to the correct url and everything. As far as I can see The site is working perfectly except for that the Logo, Header Image and Menu location options are blank (as if I hadn’t entered anything there). Those things are however easy to fix in the Customise menu(all the images are still in the media library), so I started doing that. Everything looks fine while editing it and then I press Save & Publish. But when I reload the page the images and menus are gone again. It’s as if the changes were never changed… I’ve tried checking with a different browser and to clear the cache but it doesn’t work. Is there a possibility that the site doesn’t have proper permissions to the database or something? or can I have changed something in the wrong place in the database? (I think I only edited urls though)