Traceback (most recent call last):
  File "/home/nmatlaga/Projects/evennia/evennia/evennia/commands/cmdhandler.py", line 594, in _run_command
    _progressive_cmd_run(cmd, ret)
  File "/home/nmatlaga/Projects/evennia/evennia/evennia/commands/cmdhandler.py", line 193, in _progressive_cmd_run
    value = generator.next()
  File "/home/nmatlaga/Projects/evennia/evennia/evennia/commands/default/building.py", line 3097, in func
    for obj in spawner.spawn(prototype):
  File "/home/nmatlaga/Projects/evennia/evennia/evennia/prototypes/spawner.py", line 598, in spawn
    init_spawn_value(value[0], value_to_obj_or_any),
KeyError: 0