Piwik Version error during upgrade

@Shravan wrote:

Hi,

I am trying to upgrade Piwik from 2.16.2 to 3.13.2
I have addressed all the pre-requisites and also any actions during upgrade.
I also get a Upgrade succsessful messge and upon logging in, I get below error message:

Could not parse version constraint >=PIWIK_VERSION: Invalid version string “PIWIK_VERSION”

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