I don't think there is functionality built in to the backend to do this. You will need to run some SQL against the db in configuration>database admin > run query.
Something like this:
DISABLE Trigger trigKartrisVersions_DML ON [your DB name].[dbo].[tblKartrisVersions]
UPDATE [
your DB name].[dbo].[tblKartrisVersions]
set V_Price = enter price change here
ENABLE Trigger trigKartrisVersions_DML ON [your DB name].[dbo].[tblKartrisVersions]
GO
Backup first