abap/force_local_update_task is a SAP Parameter attribute which is used to control Redirect asynchonous update task to local update task information. This is available within R/3 SAP systems depending on the version and release level.
Below is the standard documentation available and a few details of the attributes values .
In normal system operation, update task requests are processed
asynchonously by the ABAP system's update task service. As an
alternative, ABAP applications can choose (via the ABAP statement SET
UPDATE TASK LOCAL) to process update task requests for immediate start
by the local update task, i.e. synchonously and within the user's s
ession at the time of the COMMIT statement. Other update requests (e.g.
for delayed execution) are still handled asynchronously.
With the special parameter setting abap/force_local_update_task=1, all
update task requests for immediate start are handled as if the ABAP
application had chosen SET UPDATE TASK LOCAL.
See SAP Parameter Documentation for full SAP documentation for this profile parameter.