Activation key has already been used on this instance Activation key has already been used on this instance

[Anshul_Namdev]

Hi @devanshu_raturi Welcome!

@Anshul_Namdev

Hi @Simo007 Welcome!
For this issue, first consider checking that if the instance is already registered or not, via:
Settings → Usage and Plan → if it shows [Registered] means it already is.

If it does not, then you have to manually clear the license with:
docker exec -u node -it [n8n-container-name] n8n license:clear
and then just restart your n8n container and once it boots up re enter your key there, and let us know if that works or na.