Assuming you're now in R80.x & no longer need the old R77.x SML or SME log/events DBs, then yea.
To resolve the problem, delete the R77.x SmartLog/SmartEvent databases. To do so:
On SmartLog, run:
[Expert@Hostname]# rm -rf /var/log/opt/CPSmartLog-R7*/data/
On SmartEvent, run:
[Expert@Hostname]# rm -rf /var/log/opt/CPrt-R7*/events_db/
for FYI, Also remember your log storage threshold for deletion of current version is probably 5GB or less or whatever you've configured in the Mgmt/LS/SME server's object > Logs Storage > Delete when X...