I am a Subcontractor on a project and have a contract with the Prime Contractor. I have a second tier subcontractor who ceased operations after being paid in full via a joint check made out to my company and the second tier sub from the Prime. However, the second tier sub did not in turn pay a supplier used on the project. A mechanics lien has now been filed and the Prime contractor is forcing me to settle the issue (citing sections of my contract), or the amount will be taken from my contract's retention to satisfy the lien. Assuming the lien is valid and meets all requirements, do I have any options available to me?