---

This section details on the original issue you should resolve

<issue_title>UsageTracker with MIPROv2 Report AttributeError</issue_title>
<issue_description>python version : 3.10
dspy version : 3.0.4

When using UsageTracker together with MIPROv2, the following error occurs:
AttributeError: '_contextvars.ContextVar' object has no attribute 'overrides'

After debugging, I found that this error is triggered when using ParallelExecutor inside a with dspy.context(...): block.

This causesMIPROv2._optimize_prompt_parameters() to fail when evaluating the optimized prompts—because it's running inside awith dspy.context(lm=self.task_model):block, and theEvaluate call uses ParallelExecutor under the hood.

Below is a minimal reproducible example.
The error can be observed at line 153 in parallelizer.py.

importdspyfromdspy.utils.parallelizerimportParallelExecutorfromdspy.utils.usage_trackerimportUsageTrackerdspy.configure(lm=lm)dspy.settings.configure(usage_track=True,usage_tracker=UsageTracker())defdo_infer(text):returnlm(text)withdspy.context(lm=lm):executor=ParallelExecutor(num_threads=2)results=executor.execute(do_infer,batch_data)

I’m wondering—is this my fault, or is it actually a bug?

</issue_description>

<agent_instructions>The error only happens when dspy.context is in use. If just using global configdspy.configure this error is not spotted.

Meanwhile, if just usingdspy.configure globally, the returned result from dspy.Parallel call seems to not contain the usage data, please also confirm. thank you!</agent_instructions>

Comments on the Issue (you are@copilot in this section)

@chenmoneygithub@Mutouboy Thanks for reporting the issue! I can confirm that this is a real bug, will work on a fix.