Function module MB_CREATE_GOODS_MOVEMENT cannot be executed

What causes this issue?

The function module MB_CREATE_GOODS_MOVEMENT is called up for the
second time. After it was called up the first time, the function module
MB_POST_GOODS_MOVEMENT was called, but a COMMIT WORK was not carried
out in the calling program.
As running the two function modules again would result in the database
being incorrectly updated, processing is terminated. &SYSTEM_RESPONSE&
&WHAT_TO_DO& Please ensure that a COMMIT WORK is set after you call up
the function module MB_POST_GOODS_MOVEMENT.

Error message extract from SAP system. Copyright SAP SE.