Why do we get time-stamp issue in progress database?

we have upgrade from 9.1 to 11.3 version.it was working fine for two days and later database went down.In the log file its mentioned .lk fie is deleted.we are getting the below error When we do

proutil qhn -C truncate BI

OpenEdge Release 11.3 as of Wed Jul 17 16:45:17 EDT 2013

** The database was last used Mon Oct 13 12:15:15 2014. (886) ** The before-image file expected Tue Oct 14 12:48:47 2014. (887) ** Those dates don't match, so you have the wrong copy of one of them. (888)

We have restored the db from backup.We need to know the Root cause analysis for the below issue for future reference.
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