Reallocate budget on a time window where some media channels have 0 spendings

[nicologiammaria]

I am trying to reallocate budget with a few constraints on the media spendings as follow:

• reallocate just digital medias (+/- 30%)
• keep constant non-digital medias
• some of the non-digital medias have 0 spendings in the selected time window
  When looking at the report, I see that one non-digital media channel, that has 0 spending, has been reallocated (which should not happen)
  Any idea of why is this happening? Thank you in advance
  Below the code

date_range <- c("2023-01-01", "2023-12-31")
select_model <- OutputCollectX$allSolutions
AllocatorCollect1 <- robyn_allocator( 
  InputCollect = InputCollectX,
  OutputCollect = OutputCollectX,
  select_model = select_model,
  date_range = date_range,
  total_budget = NULL,
  channel_constr_low = c(0.7, 0.7, 0.7, 0.7, 0.7, 1, 1, 1, 1, 1),
  channel_constr_up = c(1.3, 1.3, 1.3, 1.3, 1.3, 1, 1, 1, 1, 1),
  scenario = "max_response",
  export = create_files,
  plot_folder = RobynRecreated$plot_folder,
)

While running I have these warning messages as well:

Media variables with 0 spending during date range: 'Out_of_home', 'Television_rebrand'
Excluded variables (coefficients are 0): Out_of_home