SugarCacheDb errors

After "Repair and Rebuild" I am receiving a couple of errors related to SugarCacheDb:

Tue Oct 31 06:03:04 2017 [2613][5634668c-b96c-11e7-ae01-0800278dc04d][ERROR] SugarCacheDb unserialize failure for key 'pmse_Dashboards_module_has_records_with_locked_fields'
Tue Oct 31 06:03:04 2017 [3984][5634668c-b96c-11e7-ae01-0800278dc04d][ERROR] SugarCacheDb unserialize failure for key 'pmse_Leads_module_has_records_with_locked_fields'

What is actually SugarCacheDb? From where those errors are coming from?

Thank you.