diff --git a/backend/app/services/host_silence_scan.py b/backend/app/services/host_silence_scan.py
index d7647ac..2d9adb1 100644
--- a/backend/app/services/host_silence_scan.py
+++ b/backend/app/services/host_silence_scan.py
@@ -12,7 +12,6 @@ from sqlalchemy.orm import Session
 from app.config import get_settings
 from app.models import Host, Problem
 from app.services.problem_rules import RuleMatch, build_fingerprint, host_silence_match_for_host
-from app.services.problems import _correlation_cutoff
 
 logger = logging.getLogger(__name__)
 
@@ -44,15 +43,13 @@ def open_or_refresh_host_silence_problem(
         match.rule_id,
         match.fingerprint_suffix,
     )
-    cutoff = _correlation_cutoff(ref)
 
     open_problem = db.scalar(
         select(Problem)
         .where(
             Problem.status == "open",
-            Problem.fingerprint == fingerprint,
+            Problem.rule_id == match.rule_id,
             Problem.host_id == host_id,
-            Problem.last_seen_at >= cutoff,
         )
         .order_by(Problem.last_seen_at.desc())
         .limit(1)
@@ -60,6 +57,7 @@ def open_or_refresh_host_silence_problem(
     if open_problem:
         open_problem.summary = match.summary
         open_problem.title = match.title
+        open_problem.fingerprint = fingerprint
         open_problem.last_seen_at = ref
         open_problem.updated_at = ref
         db.flush()
diff --git a/backend/app/version.py b/backend/app/version.py
index e1be65f..bdd9d13 100644
--- a/backend/app/version.py
+++ b/backend/app/version.py
@@ -1,5 +1,5 @@
 """Единый источник версии SAC (API, health, логи, OpenAPI)."""
 
 APP_NAME = "Security Alert Center"
-APP_VERSION = "0.4.7"
+APP_VERSION = "0.4.8"
 APP_VERSION_LABEL = f"{APP_NAME} v.{APP_VERSION}"
diff --git a/backend/tests/test_host_silence_scan.py b/backend/tests/test_host_silence_scan.py
index 6101d53..1f12782 100644
--- a/backend/tests/test_host_silence_scan.py
+++ b/backend/tests/test_host_silence_scan.py
@@ -82,6 +82,43 @@ def test_scan_does_not_duplicate_open_problem(db_session, scan_settings):
     assert len(problems) == 1
 
 
+def test_scan_does_not_duplicate_after_correlation_window(db_session, scan_settings, monkeypatch):
+    """host_silence — одна open-проблема на хост, даже если прошло > correlation window."""
+    monkeypatch.setenv("SAC_PROBLEM_CORRELATION_WINDOW_MINUTES", "60")
+    get_settings.cache_clear()
+
+    hb = _ingest(
+        db_session,
+        type="agent.heartbeat",
+        category="agent",
+        severity="info",
+        title="hb",
+        summary="heartbeat",
+    )
+    hb.received_at = datetime.now(timezone.utc) - timedelta(hours=2)
+    db_session.flush()
+
+    t0 = datetime.now(timezone.utc)
+    first = run_host_silence_scan(db_session, now=t0)
+    assert first[0].created is True
+    first[0].problem.last_seen_at = t0 - timedelta(hours=2)
+    db_session.flush()
+
+    later = run_host_silence_scan(db_session, now=t0 + timedelta(hours=3))
+    assert len(later) == 1
+    assert later[0].created is False
+    assert later[0].problem.id == first[0].problem.id
+
+    problems = db_session.scalars(
+        select(Problem).where(
+            Problem.host_id == hb.host_id,
+            Problem.rule_id == RULE_HOST_SILENCE,
+            Problem.status == "open",
+        )
+    ).all()
+    assert len(problems) == 1
+
+
 def test_scan_skips_host_without_heartbeat(db_session, scan_settings):
     _ingest(
         db_session,
diff --git a/frontend/src/version.ts b/frontend/src/version.ts
index a7532a8..2709179 100644
--- a/frontend/src/version.ts
+++ b/frontend/src/version.ts
@@ -1,4 +1,4 @@
 /** Fallback до загрузки /health; при релизе держите в sync с backend/app/version.py */
 export const APP_NAME = "Security Alert Center";
-export const APP_VERSION = "0.4.7";
+export const APP_VERSION = "0.4.8";
 export const APP_VERSION_LABEL = `${APP_NAME} v.${APP_VERSION}`;