Several Victron units in one system are not syncronized in time and date

We operate several identical RS 48/6000/100 inverters and a SmartSolar Charger VE.Can 150/100 on a Cerbo GX system. When I export the history for each device, it shows that only one inverter and the SmartSolar are on the same time base as the Cerbo GX. The others are lagging behind by over 20 hours. The Cerbo GX is running on the correct time. Statistical analysis is therefore impossible. If I load our three-phase system and draw, for example, 6 kWh, it displays this correctly on one inverter, but on the others, it might start a new day during the load, splitting the drawn kWh over two days. Deleting the history hasn’t solved the problem. How can I get the history of all devices to be on the same time base? Any method of syncronization?