I have a client that has owed me a substantial amount of money for a year and a half. The same client also stores material for a different job in my warehouse and has always kept up with paying these storage charges. The job that the client owes for is not connected in any way to the material in storage. Client now wants to pull all material out of storage but I feel I will then not be paid for the other outstanding invoice. Can I legally not release the material from storage until the other outstanding invoice is paid even though the material in storage is not related to the outstanding invoice?