Dealing with Conflicts When You Run the Apply Command
When you run the OPatch apply command, you may encounter the following conflicts:
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Conflict with a patch already applied to the contents of the Oracle_home directory.
In this case, stop the patch installation and contact Oracle Technical Support.
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Conflicts with a subset patch already applied to the contents of the Oracle_home directory.
In this case, continue the installation, because the new patch contains all of the fixes from the existing patch. The subset patch is automatically rolled back before the installation of the new patch.