diff --git a/homeassistant/config_entries.py b/homeassistant/config_entries.py
index ca3a78f8046..e76b7ae099f 100644
--- a/homeassistant/config_entries.py
+++ b/homeassistant/config_entries.py
@@ -1646,6 +1646,7 @@ class ConfigEntriesFlowManager(
             report_usage(
                 "creates a config entry when another entry with the same unique ID "
                 "exists",
+                breaks_in_ha_version="2026.3",
                 core_behavior=ReportBehavior.LOG,
                 core_integration_behavior=ReportBehavior.LOG,
                 custom_integration_behavior=ReportBehavior.LOG,
diff --git a/tests/test_config_entries.py b/tests/test_config_entries.py
index 45bb956b7a1..dc893e4c5fd 100644
--- a/tests/test_config_entries.py
+++ b/tests/test_config_entries.py
@@ -8823,7 +8823,7 @@ async def test_create_entry_existing_unique_id(
 
     log_text = (
         f"Detected that integration '{domain}' creates a config entry "
-        "when another entry with the same unique ID exists. Please "
-        "create a bug report at https:"
+        "when another entry with the same unique ID exists. This will stop "
+        "working in Home Assistant 2026.3, please create a bug report at https:"
     )
     assert (log_text in caplog.text) == expected_log