Library /sys$common/syshlp/lse$clihelp.hlb SET, CMS, Qualifiers, /MERGE  *Conan The Librarian (sorry for the slow response - running on an old VAX)

       /MERGE=generation-exp
       /NOMERGE

    Controls whether LSE merges a reserved or fetched element with
    another generation of the same element. The initial setting is
    /NOMERGE.