Game Crash select and hold left at runemaster

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FATAL ERROR in
action number 1
of Draw Event
for object obj_runetrade:

Push :: Execution Error - Variable Index [0,-5] out of range [1,509] - -1.items(100527,-5)
at gml_Object_obj_runetrade_Draw_64
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Go to the runemaster and select the first rune. Hold left and the game will crash since it is not cycling through memory entries(no highlight).