Upgrades between minor versions of the agent, like from 1.1 to 1.2 are always backwards compatible. Upgrades that involve a major version bump often come with some backwards incompatible changes.
Before upgrading the agent, be sure to review the:
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{apm-guide-ref}/agent-server-compatibility.html[Agent and Server compatibility chart]
We love all our products, but sometimes we must say goodbye to a release so that we can continue moving forward on future development and innovation. Our End of life policy defines how long a given release is considered supported, as well as how long a release is considered still in active development or maintenance.