Cal. Gov. Code § 51254

Notwithstanding any other provision of this chapter, the parties may upon their mutual agreement rescind a contract in order simultaneously to enter into a new contract pursuant to this chapter, which new contract would enforceably restrict the same property for an initial term at least as long as the unexpired term of the contract being so rescinded but not less than 10 years. Such action may be taken notwithstanding the prior serving of a notice of nonrenewal relative to the former contract.