Not a autoflower started flowering on its own at week 5

Hey there Viotekusa, sure plenty of things can cause a plant to trigger flowering , even sometimes giving flowering nutes can do that, or in your case more likely it was either stress from all the training that triggered a survival response or just a mix up with the seed company. Either way, if you contact the breeder with your diary they are usually quite happy to replace the seed with a fresher batch or some store credits or whatever. It's up to you if you keep iit, but i would see this one through unless you really need the space and the extra veg weeks. Hope this helps ! 🚀