Game crashed when trying to press F5 in training mode

[graceful sapphire]

---

##########################################################```##################################
ERROR in
action number 1
of Step Event0
for object obj_workshop_async:

Data structure with index does not exist.
############################################################################################

called from - gml_Script_gml_script_destroy (line 7)
called from - gml_Script_gml_program_destroy (line 8)
called from - gml_Script_ugc_clear_current (line 84)
called from - gml_Script_ugc_set_current (line 29)
called from - gml_Object_obj_workshop_async_Step_0 (line 120)```

oh, I forgot to mark it with the crashes tag...