Hi Your schematic prefix must didn't math PCB prefix as before. for the old design, the editor will re-assign the component ID, to make sure schematic match PCB, it depends on component prefix. this change since v6.3.39 [https://easyeda.com/page/update-record-v6.3](https://easyeda.com/page/update-record-v6.3) for solve the component will be removed issue completely. for the new project, you will find that, this issue will not happen again. How to fix: 1, make sure the schematic all components' prefixes match PCB component prefixes, and all prefixes are unique in the schematic or PCB. 2, open schematic and PCB file source, via: Top menu - File - EasyEDA file source. 3\, find out all newgId\, and set them as \`false\`\. PCB do this action too\.  4, Click the Apply button, the editor will re-assign the component ID base on the prefix. 5, Then schematic and PCB components ID will be matched, and will not remove the parts. Thanks

Ok did that.  There's no newgId in the Schematic, but one in the PCB file which I changed to false. However also had several component labels move position and change to locked.  Fixed them all now but why is this happening ?   EasyEDA used to be a stable platform and I have loads of old designs that sometimes need support.

AND I've just edited the schematic slightly and it wants to change 3 unrelated components.  I've checked the JSON and it's changed newgId back to true. How do I keep it from not corrupting the file ?