@wsusprodia in the future recommend posting in this forum for products that are not Insider, this is the sub-forum for WSUS:
For the issue you mention, how come you are trying deploy the older "2019-08 Security Monthly Quality Rollup" update?
Monthly Quality Rollups superseded each other each month, so you might already have one of the newer ones installed, see a list here:
Could you please post an output from the command below (to check what updates you have already installed):
dism /Online /Get-Packages /Format:table