Unable to delete an account

I can´t delete an account because it says "Cannot delete account with linked contracts"

This account does not have any tickets. contracts or sales associated with it, how can I delete from the database

Thank you

Perhaps there is Not-Active Contracts linked to this Account.
Please go to Contracts tab under this Account and by using the bottom toolbar modify the filter to show 'All' statuses (by default only Active Contracts are shown).

Thank you for your help, that was the case.