SafeNet Sentinel Developer's Manual page 162

Chapter 6 – Secure Remote Updates
No, the new license can be added only once by applying the license addition
(.nlf) file.
Question 8 - What is the role of Device Update Counter value in
removing all licenses from the token? In what scenarios its value is
updated?
Device Update Counter is the global update counter in the end user token
which is incremented every time all licenses from the token are deleted. Its
value is also updated in the following scenarios:
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■
■
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Cheat counter value updates.
Last known date and time (LKDT) updates, once the lease operation
has been performed.
User limit value updates.
Sentinel Hardware Keys Developer's Guide