If you want to rerun a advertisement witch already installed, you need first to remove a registry key:
x86 architecture
HKLM\SOFTWARE\Microsoft\SMS\MobileClient\Software Distribution\Execution History\System\package id
x64 architecture
HKLM\SOFTWARE\Wow6432Node\Microsoft\SMS\MobileClient\Software Distribution\Execution History\System\package id
Then re-run the advertisement in SCCM Client Center.
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