ML currencies were changed for valuation area &1 in productive mode

What causes this issue?

The currencies currently set for the material ledger and the currency
types set for valuation area <(>&<)>1 differ from those set at
conversion of the data (production startup).

System Response

The system does not allow you to post transactions after changing the
currency settings to ensure consistency.

How to fix this error?

Replace the current settings with the those entered at production
start-up.
If you wish to change the currency settings, you must use programs to
convert data from the old to the new currencies.
Inform your system administrator.

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.