The current condition #vm_disk_quota <= #message_sum is checking the lengths of vm_disk_quota and message_sum, not their actual values. So, it won't compare the numeric values for your intended logic.
If they're strings that can be safely converted to numbers, use tonumber():
if (vm_disk_quota and message_sum and tonumber(vm_disk_quota) <= tonumber(message_sum)) then
-- your code
end
This will compare them as numbers, ensuring that vm_disk_quota is less than or equal to message_sum.
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