oracle psu apply quesiton

 oracle psu apply quesiton

,our customer said that in rac environment  they have apply the db psu 11.1.0.7.2 ( 9209238),

but they have apply psu 11.1.0.7.2 for crs (9207257), seem the db is start ok,

now  they want to update crs to 11.1.0.7.2  , they did't sure if have  to rollback to

 db psu 11.1.0.7.2 ( 9209238),or just apply  psu 11.1.0.7.2 for crs (9207257) regardless the db

psu?