Error message

• Warning: imagecreatefrompng(): gd-png: fatal libpng error: Read Error: truncated data in image_gd_load() (line 258 of /home/miniset/miniset.net/modules/system/image.gd.inc).
• Warning: imagecreatefrompng(): gd-png error: setjmp returns error condition 3 in image_gd_load() (line 258 of /home/miniset/miniset.net/modules/system/image.gd.inc).
• Warning: imagecreatefrompng(): 'public://set/qstl-mmf403951-0.png' is not a valid PNG file in image_gd_load() (line 258 of /home/miniset/miniset.net/modules/system/image.gd.inc).