Upgrade Policy Server from 32 to 64 bit

Document ID : KB000098910
Last Modified Date : 31/05/2018
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When upgrading Policy Server from 32 to 64 bit, it can overwrite upgrade ? If it can't so, how should it upgrade ?
You should uninstall 32 bit Policy Server and after that install 64 bit version.
If you try to upgrade as overwriting..you see failing to install as below.

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