R12.1.3 : Recieved Error while applying patch "p18145257_R12.PN.B_R12_GENERIC.zip"

hello,

Received Error while applying patch "p18145257_R12.PN.B_R12_GENERIC.zip"

The patch log file is showing :

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Recieved Error while applying patch "p18145257_R12.PN.B_R12_GENERIC.zip"

Missing prerequisite codelevel for entity 'pj_pf'.

This patch requires the following codelevel or higher: 'R12.PJ_PF.B.6'.
The current on-site codelevel for the entity 'pj_pf' is : 'R12.PJ_PF.B.3'.

In order to apply this patch you must first apply a patch that introduces
at least the minimum required codelevel.

You may merge this patch with a patch that introduces the required codelevel.