Exception CX_RSBK_REQUEST_LOCKED logged

1.Previous request has  status 'red' and
2.Exception CX_RSBK_REQUEST_LOCKED logged.

We are getting this error at DTP level. Once the error is triggered and we need to delete the failed req and re-load it

Ans:

It seems that the system is trying to load data when there is another lock (mostly another request being loaded or another target being loaded).

See if you have enough background processes while executing the DTP.
Also, you can see SM12 for locks. Also check SM37 if the job has finished or not.

Now, delete the request which has failed (in RED) and if you are using a process chain, repeat the step in the chain.
Or else, load manually.

To avoid it everyday, see if there are any conflicting jobs running at that time.
If yes, please run/ schedule this load prior to the job or after it finishes.