System is unable to derive the inverse rate in case of Conversion Rate Type as “User”

We have to requirement to enter the user defined rate to pay the EUR invoices through GBP Bank account. User have access only to GBP to EUR equivalent rate and they don’t have inverse rate information.

In the Payment batch, user entered the GBP to EUR rate but still the PPR got struck with the Missing conversion rate action. System is unable to derive the inverse rates automatically. It a big hindrance to the process . Could you please suggest is there any to derive the inverse rate automatically for User defined rates.