Having Muluna as hidden optional dependency creates a circular dependecy, when Muluna is installed, as they have a hidden optional dependency to Solar Productivity.

Не удалось загрузить следующие моды: planet-muluna/compat/solar-productivity.lua:2: bad argument #1 of 3 to 'insert' (table expected, got nil)
stack traceback:
[C]: in function 'insert'
planet-muluna/compat/solar-productivity.lua:2: in main chunk
[C]: in function 'require'
planet-muluna/data.lua:27: in main chunk

on version 2.1.7 everything is fine.

Fixed with new update