Error posting document in ECC by technical users

Dear Guru,

I work in SRM in ECS with different SAP ECC system and FM module.

I have an important issue during Purchase Order or Confirmation posting in SAP ECC because in same cases the system show the following error message "Object is currently locked by user YCP25125" (YCP25125 is a technical user for RFC connection between SRM and ECC) and Purchase Order or Confirmation is in error.

Do you have any idea about this behaviour? Do you have any possible solution?

Thanks in advance.

BR

Giuseppe