SAP Message /SAPCND/CUST_T301 - User &1 has a lock that prevents generation

Diagnosis
You started an online generation run as a part of condition maintenance,and the user &v1& did the same while his generation is still running.Two simultaneous generation runs could lead to a deadlock situationwhich is not acceptable.

System Response
Your condition maintenance session will be ended in a controlled way toprevent the deadlock situation.

Procedure
Please wait a while until the lock of user &v1& is released and try thenagain, or make sure that user &v1& ends his transaction.