[dev] manual file change result in package error

Hi, I upgrade to OTRS 3.3.8 and configure with ITSM and made a manual change that I used to make to Kernel/Output/HTML/Standard/AgentTicketPhone.dtl now gives me an error in the ITSMIncidentProblemManagement package. There is a possibility to disable checking for that file, or I am thinking maybe I can do a package with my changes that overwrite that file, can this hypothetical package solve my problems? Do it need ITSMIncidentProblemManagement package as dependence? Jon