Yum update ends with these messages :

--> Running transaction check
--> Processing Dependency: valgrind = 1:2.2.0 for package: valgrind-callgrind
--> Processing Dependency: libgssapi.so.1()(64bit) for package: nfs-utils
--> Processing Dependency: nfs-utils-lib for package: nfs-utils
--> Processing Dependency: librpcsecgss.so.1()(64bit) for package: nfs-utils
--> Processing Dependency: libnfsidmap.so.0()(64bit) for package: nfs-utils
--> Restarting Dependency Resolution with new changes.
--> Populating transaction set with selected packages. Please wait.
---> Package libgssapi.x86_64 0:0.8-1 set to be updated
---> Package nfs-utils-lib.x86_64 0:1.0.6-3 set to be updated
--> Running transaction check
--> Processing Dependency: valgrind = 1:2.2.0 for package: valgrind-callgrind
--> Restarting Dependency Resolution with new changes.
--> Populating transaction set with selected packages. Please wait.
--> Running transaction check
--> Processing Dependency: valgrind = 1:2.2.0 for package: valgrind-callgrind
--> Restarting Dependency Resolution with new changes.
--> Populating transaction set with selected packages. Please wait.
--> Running transaction check
Error: Unable to satisfy dependencies
Error: Package valgrind-callgrind needs valgrind = 1:2.2.0, this is not
available.