PQprepare in PostgreSQL 7.4 (lack of SAVEPOINTs)

Is there a way to prevent transaction abort when preparing command in version 7.4?

 

I googled but haven't been able to find the answer. The issue occurs when our software trys to prepare a command that is already prepared (by the same or different app). PQprepare returns error and aborts current transaction. The company is not willing to upgrade from 7.4 to a later version due to risk.

 

 

Thank you

Konstantin