This section applies only to LispWorks for UNIX only (not LispWorks for Linux, FreeBSD, or x86/x64 Solaris).
Dated license keys used at delivery time when delivering an unprotected runtime affect the expiration date of that delivered runtime image.
Specifically, if any of
are dated, then the earliest expiration date of all such keys will be hard-wired into the runtime image. However, the LispWorks Delivery PLUS key itself does not affect the expiration date.
When you obtain undated keys for LispWorks or any layered product, it is therefore advisable to either delete or comment out any corresponding dated keys from that keyfile.
LispWorks Delivery User Guide - 13 Dec 2011