Crash when running into Treasure Golem

it was on a dead end, and a low-level realm where everything else was running away from me


############################################################################################
FATAL ERROR in
action number 1
of Create Event
for object obj_battlecontroller:

Unable to find any instance for object index ‘127979’ name ‘’
at gml_Object_obj_battlecontroller_Create_0
############################################################################################

stack frame is
gml_Object_obj_battlecontroller_Create_0 (line -1)
called from - gml_Script_instance_create (line -1) -
gml_Room_battle_Create