Since your residency and FEC are annual, your '2 year' contract is between you and the school, it is not registered in the national database.

I would begin IMMEDIATELY to discuss this with your FAO because your only leverage is the balance of this year and providing student grades at the end of the semester. Imply that if you do not receive a release you will leave PRIOR to the school year and unable to provide grades, every departments nightmare.

If you are a competent well-liked teacher they do not want to give you a release letter.

If you are a thorn in their side, they will be more likely to release you. Try dating a few students.