California Code, Code of Civil Procedure - CCP § 697.020

(a) If a lien is created on property pursuant to Title 6.5 (commencing with Section 481.010) (attachment) and after judgment in the action a lien is created pursuant to this division on the same property under the same claim while the earlier lien is in effect, the priority of the later lien relates back to the date the earlier lien was created.

(b) If a lien is created on property pursuant to this division and a later lien of the same or a different type is created pursuant to this division on the same property under the same judgment while the earlier lien is in effect, the priority of the later lien relates back to the date the earlier lien was created.

(c) Nothing in this section affects priorities or rights of third persons established while the earlier lien was in effect under the law governing the earlier lien.