Add a value for this EmptyHandVFX (Make sure to do this), so selected a VFX powerup device
Save your file
Remove @editable from this device
Your device is now in an infinite glitched state where it keeps asking to be resaved with almost every thing you do. E.g. launch session, or compile verse or verse refresh
Being unable to save devices on this state are to prevent data loss, and it happens when you edited something on the code, while the instance of the device on the world still has a reference to the old value stored…
It is related to this bug report (also check the comments I wrote some more details on it):