ENGINE-03005 Execution of UPDATE MessageEntity failed. Entity was updated by another transaction concurrently.

Hi i have a simple workflow that only contain 1 activity. the activity is a service task that invoke http request to my API. I noticed from my API logging that it got called twice and both is successful, then i check the data on ACT_HI_JOB_LOG, there is this error message on the JOB_EXCEPTION_LOG_. will this cause the double trigger to my API? what is causing this error? how can 1 service task cause a concurrency error? here is my bpmn:
SAMPLE_BPMN.bpmn (4.2 KB)

Here is the ACT_HI_JOB_LOG data:

Hello my friend!

Try changing the name of your connector’s response variable.
Instead of statusCode, put any other name, and please let me know if it worked.

William Robert Alves