Ok to travel on transit visa if you have regular visa (that has been lost)?

I'm scheduled to travel to Beijing from Hong Kong in a few hours, and I cannot find my China entry permit. I'm a US citizen, so I'm eligible for the free transit. My question is whether I can obtain the transit visa if I have another active 10-year entry permit that I am unable to produce. Does having the 10-year preclude me from using the transit (provided I satisfy the other requirements of travel within 72 hours, etc.)? Thank you.