Symptom

During your sync operation, you receive an invalid error showing, ” Could not commit transaction” on target application, which is SAPB1 here.

Cause

There might be a number of reasons for this error:
a. This error indicate that you have an incorrect usage of the SBO_SP_TransactionNotification
b. Problems with DI Server Database issue. 

Resolution

How to Resolve DI-API Server SBO_SP_TransactionNotification_Problem.pdf

SBO_SP_TransactionNotification_Problem

If both the resolution does not solve the issue, you can try restarting the DI-Server to restart the sync operation.