From time to time our data provider fixes some small discrepancies in the price data or market events. As Capitally has to make a copy of this data to run as quickly as it does, this copy sometimes became out of sync with the source, leading to errors - especially around splits and dividends.
With this update the local copies will be automatically synced again whenever such change occurs, without any intervention on your side.
To make the price update dates more transparent, when you open the Asset's Price tab, you will see the last updated time, a symbol if the price is manual or intraday, and last update time for currency rates.