Problem in HRMD_A Idocs: Object is Locked

Hi Everyone,

I would like to ask for assistance on the problem below.

We've encountered almost everyday failed HRMD_A idocs. Almost all of the idocs have the same error message: "Object is Locked. A locked key has been set for the object."

The object type is "P".

Can you help us on how to solve this problem?

Thanks in advance!