2020-05-07 17:37:25: ERROR[Main]: ServerError: AsyncErr: ServerThread::run Lua: Runtime error from mod 'default' in callback luaentity_Step(): /usr/local/share/minetest/builtin/game/item_entity.lua:203: assertion failed!
2020-05-07 17:37:25: ERROR[Main]: stack traceback:
2020-05-07 17:37:25: ERROR[Main]: 	[C]: in function 'assert'
2020-05-07 17:37:25: ERROR[Main]: 	/usr/local/share/minetest/builtin/game/item_entity.lua:203: in function 'on_step'
2020-05-07 17:37:25: ERROR[Main]: 	...inetest/games/minetest_game/mods/default/item_entity.lua:43: in function <...inetest/games/minetest_game/mods/default/item_entity.lua:42>