"To remove the lien" means to officially get rid of a claim or hold on someone's property or assets, allowing the person to fully own and use their property without any restrictions or obligations. Full definition
So, a form of a secured debt would be something like a mortgage or a car loan where a bankruptcy does not remove that lien from the related asset. (hoyes.com)
At the end of the loan term, the loan is paid in full and the lender removes the lien from the property. (reversemortgagehelp.com)
If you ever want to sell or refinance, you'll have to remove the lien first. (sapling.com)