Debugger entered--Lisp error: (args-out-of-range 173 173)
  get-text-property(173 org-ref-label)
  org-ref-delete-labels(174 174)
  insert-buffer-substring(#<buffer  *temp*>)
  sort-reorder-buffer(((6 678 . 719) (7 636 . 677) (11 720 . 761) (12 426 . 467) (15 468 . 509) (25 216 . 257) (27 384 . 425) (30 174 . 215) (33 342 . 383) (39 510 . 551) (41 552 . 593) (45 300 . 341) (49 594 . 635) (51 258 . 299)) ((30 174 . 215) (25 216 . 257) (51 258 . 299) (45 300 . 341) (33 342 . 383) (27 384 . 425) (12 426 . 467) (15 468 . 509) (39 510 . 551) (41 552 . 593) (49 594 . 635) (7 636 . 677) (6 678 . 719) (11 720 . 761)))
  sort-subr(nil #f(compiled-function () #<bytecode -0x170abd17f16116a6>) end-of-line #f(compiled-function () #<bytecode -0x1dd9a59d512caea3>) nil <)
  org-table-sort-lines(nil nil nil nil t)
  funcall-interactively(org-table-sort-lines nil nil nil nil t)
  call-interactively(org-table-sort-lines nil nil)
  command-execute(org-table-sort-lines)