Runic Grimoire Librarian Crash

I get a crash when I try to redeem for the runic grimoire quest at the librarian.


############################################################################################
FATAL ERROR in
action number 1
of Key Press Event for E-key Key
for object obj_librarian:

Variable obj_librarian.already(100184, -2147483648) not set before reading it.
at gml_Script_scr_AddToBeastiary
############################################################################################

stack frame is
gml_Script_scr_AddToBeastiary (line 0)
gml_Object_obj_librarian_KeyPress_69

Crash is still present in 0.1.1 and seems to affect all grimoires.