Log-version physical files accumulate on a system and you should periodically delete old logs that are not needed. A log-version is created such that only the security officer is authorized to delete it.
The Operational Assistant* provides a cleanup function which includes the deletion of old QHST files. Another alternative is:
WRKOBJ OBJ(QSYS/QHST*) OBJTYPE(*FILE)
Use option 4 to delete old unneeded files.
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