Low Fuse fails when resetting Gemma bootloader

[Michael5204]

I'd been modifying the NeoPixel 16 Ring earrings software, adding user input, features. Using EEPROM for color and waveform patterns. Using several hundred bytes of RAM (I don't think I exceeded 512, tho), with the code consuming close to the 5,130 byte limit, occasionally exceeding it before refactoring. Then the Gemma started misbehaving: not running after load; for a while it wouldn't go into load mode (red light wouldn't blink); now I can successfully load the BLINK sketch, but not formerly-working sketches I'd written. So I decided to reload the bootloader. Everything went according to the script, until the serial monitor displayed "Low Fuse: 0xF1 is 0xFE", followed by "Fuses Failed". Any idea what's wrong? Or what to try next? Thanks.

[adafruit_support_rick]

Odd. The fuse should be 0xFE, I believe. Does the bootloader work now, in spite of this error?