Is there a way to merge two custom roles created into one single custom role?

Summary:

Hi All,

As per the initial requirement from client we created several custom roles for Projects module. However, the client has now come up with a requirement that instead of allocating the roles one by one to a user, is there a possibility to merge the custom roles into one single role. It will be easier for them to assign a single role instead of multiple roles to the user.

Is there a way to merge the roles into one?

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