Why does unpack not work for some tables while I,v loop works for all the tables?

Module

local module = {B = false, ['GGG'] = 'My', S= 'GirlFriend', C = 'Just', x = 'Left', qw = 'Me'} 


return module

ServerScript

Mod = require(game.Workspace.ModuleScript)

while wait(1) do
    print(unpack(Mod))
end

Prints Nothing but when I do a I,v loop it perfectly prints everything

while wait(1) do
for I,v in pairs(Mod) do

print(I,v)

end

end