I cannot figure out why I cannot adjust the height on my H & M Freeman chair. I took the casters off and tried to turn the adjuster but it appears welded wheeler it is. I’ve attached a pic to show what I mean. Thank you for advice. Click image for larger version.  Name: 03525025-8D7A-4157-AD4A-F5504579C23D.jpg  Views: 299  Size: 72.9 KB  ID: 13005