addfact(mq0001_completed)
In older versions, you could complete almost any quest ID. Now, many quests have been split into sq (secondary quest) and mq (main quest) containers. Using a generic completequest on an mq tag often triggers a Save Corruption Protection —a CDPR safeguard that detects inconsistent state changes and prevents autosaving.
While there is no single "Complete All Quests" button, you can still use specific console commands to force quest completion or bypass bugs in The Witcher 3
Unless you are truly stuck due to a bug, avoid "complete quest" patches. They are notorious for causing "silent" bugs—where you finish the quest now but find out 20 hours later that a major character like Yennefer or Triss has disappeared from the world entirely.