Freeze Exchange Rate
Freeze Exchange Rate
You can save specific exchange rates in ERPNext or retrieve current exchange rates between currencies. Stale exchange rates are another name for preserved exchange rates in ERPNext.
If the field for Currency Exchange Rate in your sales and purchase transactions is frozen, it means that the option to allow outdated exchange rates in transactions is activated. If you want the Currency Exchange Rate field to be editable once more, turn off the Stale Exchange Rate function from:
*Accounting > Accounting Masters > Accounts Settings *Uncheck field "Allow Stale Exchange Rates".

*Save Account Settings
*Refresh your ERPNext account
*Check Sales / Purchase transaction once again
The Exchange Rate field in the transactions should once again become editable following this setting.