Activation Failed on self hosted n8n using docker

Questions
1

Hi Team,
using docker i self hosted n8n today and got key also on email but when i tried to enter the same getting error that
”Activation failed

*Activation key has already been used on this instance”

please help me to make this my account active.*

2

Try running the following command from within your docker container:
n8n license:clear

From outside docker:
docker exec -u node -it n8n license:clear