You are forced to upgrade to SketchUp Pro 2024/2025 (subscription) if:
Trimble no longer sells new licenses for SketchUp 2017. The official activation servers for the 2017 version have been shut down. This means: license sketchup 2017
Before discussing the mechanics of a license, it is crucial to understand why SketchUp 2017 maintains such high demand. You are forced to upgrade to SketchUp Pro
This often happens to Classic License holders. Trimble no longer sells new licenses for SketchUp 2017