BugReport: Game crash after deleting surface (Moon orbit)

[johny-patera]

Appeared after today's update to version: 0.6.103 Before never happened. Game crash after attempt of deleting surface (Moon orbit). Repeated 3 times. Deleting surface without problem before today (done many times). Report string:

The mod Space Exploration (0.6.103) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event space-exploration::on_gui_click (ID 1)
__space-exploration__/scripts/zone.lua:3101: attempt to index field '?' (a nil value)
stack traceback:
    __space-exploration__/scripts/zone.lua:3101: in function 'clean_global_after_surface_deletion'
    __space-exploration__/scripts/zone.lua:2536: in function 'delete_surface'
    __space-exploration__/scripts/zonelist.lua:2632: in function 'callback'
    __space-exploration__/scripts/event.lua:15: in function <__space-exploration__/scripts/event.lua:13>

[Wiwiweb]

Fixed in 0.6.104