I assume you mean it went back to the initial policy? This can be checked with the CLI command cpstat fw
It should show your normal policy name. It could happen that it is unable to fetch the policy during bootup. Did you changed the version in SmartConsole and did a publish? Did you enable MVC? What Check Point guide you followed for upgrade? clean install or inplace upgrade?
Search for errors like this during boot:
going to fetch policy from MGMT...
Fetching FW1 Security Policy From: <IP>
Installing Security Policy <policy name>
Failed to Load Security Policy
Failed to Load Security Policy: Module version as defined by FW object,
does not match actual version installed
Fetching Security Policy Failed
Failed to fetch policy from masters in masters file
Fetching Threat Prevention Security Policy From: <IP>
Threat Prevention Security Policy wasn't loaded
Fetching Threat Prevention policy failed
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