python
diff --git a/‎Lib/test/test_free_threading/test_monitoring.py‎
Lines changed: 3 additions & 0 deletions b/‎Lib/test/test_free_threading/test_monitoring.py‎
Lines changed: 3 additions & 0 deletions
diff --git a/‎Misc/NEWS.d/next/Core_and_Builtins/2025-11-22-10-43-26.gh-issue-120158.41_rXd.rst‎
Lines changed: 2 additions & 0 deletions b/‎Misc/NEWS.d/next/Core_and_Builtins/2025-11-22-10-43-26.gh-issue-120158.41_rXd.rst‎
Lines changed: 2 additions & 0 deletions
diff --git a/‎Python/instrumentation.c‎
Lines changed: 1 addition & 1 deletion b/‎Python/instrumentation.c‎
Lines changed: 1 addition & 1 deletion
@@ -73,6 +73,9 @@ def test_instrumentation(self):
                 break
 
             self.during_threads()
+            # Sleep to avoid setting monitoring events too rapidly and
+            # overflowing the global version counter
+            time.sleep(0.0001)
 
         self.after_test()
 
 
@@ -0,0 +1,2 @@
+Fix inconsistent state when enabling or disabling monitoring events too many
+times.
@@ -2021,12 +2021,12 @@ _PyMonitoring_SetEvents(int tool_id, _PyMonitoringEventSet events)
     if (existing_events == events) {
         return 0;
     }
-    set_events(&interp->monitors, tool_id, events);
     uint32_t new_version = global_version(interp) + MONITORING_VERSION_INCREMENT;
     if (new_version == 0) {
         PyErr_Format(PyExc_OverflowError, "events set too many times");
         return -1;
     }
+    set_events(&interp->monitors, tool_id, events);
     set_global_version(tstate, new_version);
 #ifdef _Py_TIER2
     _Py_Executors_InvalidateAll(interp, 1);
Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,2 @@`
	`1`	`+Fix inconsistent state when enabling or disabling monitoring events too many`
	`2`	`+times.`
Original file line number	Diff line number	Diff line change
`@@ -2021,12 +2021,12 @@ _PyMonitoring_SetEvents(int tool_id, _PyMonitoringEventSet events)`
`2021`	`2021`	`if (existing_events == events) {`
`2022`	`2022`	`return 0;`
`2023`	`2023`	`}`
`2024`		`- set_events(&interp->monitors, tool_id, events);`
`2025`	`2024`	`uint32_t new_version = global_version(interp) + MONITORING_VERSION_INCREMENT;`
`2026`	`2025`	`if (new_version == 0) {`
`2027`	`2026`	`PyErr_Format(PyExc_OverflowError, "events set too many times");`
`2028`	`2027`	`return -1;`
`2029`	`2028`	`}`
	`2029`	`+ set_events(&interp->monitors, tool_id, events);`
`2030`	`2030`	`set_global_version(tstate, new_version);`
`2031`	`2031`	`#ifdef _Py_TIER2`
`2032`	`2032`	`_Py_Executors_InvalidateAll(interp, 1);`