The motion court correctly held that plaintiff landlord's "self-help" action in changing the locks to the demised premises, thereby impeding defendants' access and use thereof prior to the rent commencement date, and therefore prior to any default by defendant tenant, was a breach of the lease that suspended the tenant's yet to be incurred obligation to pay rent ( see, Barash v Pennsylvania Term. Real Estate Corp., 26 NY2d 77, 82-84). Further, landlord is precluded from recovering against defendant guarantor because the guarantee limited his obligations to the period that the tenant "physically occupied]" the demised premises, and the tenant never came into actual physical possession. The tenant's forcible eviction claim for treble damages under RPAPL 853 is without merit because the tenant never moved into the premises. We have considered the parties' remaining contentions for affirmative relief and find them to be without merit.