diff --git a/apps/server/src/persistence/ProviderSessionRuntime.ts b/apps/server/src/persistence/ProviderSessionRuntime.ts
index a3475d2f190..2ccdd862522 100644
--- a/apps/server/src/persistence/ProviderSessionRuntime.ts
+++ b/apps/server/src/persistence/ProviderSessionRuntime.ts
@@ -1,7 +1,9 @@
+import * as Arr from "effect/Array";
 import * as Context from "effect/Context";
 import * as Effect from "effect/Effect";
 import * as Layer from "effect/Layer";
 import * as Option from "effect/Option";
+import * as Result from "effect/Result";
 import * as Schema from "effect/Schema";
 import * as Struct from "effect/Struct";
 import * as SqlClient from "effect/unstable/sql/SqlClient";
@@ -280,18 +282,30 @@ export const make = Effect.gen(function* () {
         ),
       ),
       Effect.flatMap((rows) =>
+        // Skip rows that no longer decode (e.g. written by an older build)
+        // instead of failing the whole list — one stale row must not disable
+        // every consumer that enumerates sessions, such as the reaper.
         Effect.forEach(rows, (row) =>
           decodeRuntimeRow(row).pipe(
-            Effect.mapError((cause) =>
-              PersistenceDecodeError.fromSchemaError(
-                "ProviderSessionRuntimeRepository.list:decodeRows",
-                cause,
-                { threadId: row.threadId },
-              ),
+            Effect.map(Option.some),
+            Effect.catch((cause) =>
+              Effect.logWarning("provider.session.runtime.row-skipped", {
+                threadId: row.threadId,
+                error: PersistenceDecodeError.fromSchemaError(
+                  "ProviderSessionRuntimeRepository.list:decodeRows",
+                  cause,
+                  { threadId: row.threadId },
+                ).message,
+              }).pipe(Effect.as(Option.none<ProviderSessionRuntime>())),
             ),
           ),
         ),
       ),
+      Effect.map((decoded) =>
+        Arr.filterMap(decoded, (row) =>
+          Option.isSome(row) ? Result.succeed(row.value) : Result.failVoid,
+        ),
+      ),
     );
 
   const deleteByThreadId: ProviderSessionRuntimeRepository["Service"]["deleteByThreadId"] = (
diff --git a/apps/server/src/persistence/RepositoryErrorCorrelation.test.ts b/apps/server/src/persistence/RepositoryErrorCorrelation.test.ts
index f7425200fd1..379b06e2a22 100644
--- a/apps/server/src/persistence/RepositoryErrorCorrelation.test.ts
+++ b/apps/server/src/persistence/RepositoryErrorCorrelation.test.ts
@@ -182,7 +182,7 @@ describe("persistence error correlation", () => {
     }).pipe(Effect.provide(authPairingLinkLayer)),
   );
 
-  it.effect("correlates provider runtime SQL and per-row decode failures by thread", () =>
+  it.effect("skips undecodable provider runtime rows and correlates SQL failures by thread", () =>
     Effect.gen(function* () {
       const runtimes = yield* ProviderSessionRuntime.ProviderSessionRuntimeRepository;
       const sql = yield* SqlClient.SqlClient;
@@ -215,16 +215,24 @@ describe("persistence error correlation", () => {
         )
       `;
 
-      const decodeError = yield* Effect.flip(runtimes.list());
-      assert.instanceOf(decodeError, PersistenceErrors.PersistenceDecodeError);
-      assert.deepStrictEqual(decodeError.correlation, { threadId });
-      assert.equal(
-        decodeError.message,
-        `Decode error in ProviderSessionRuntimeRepository.list:decodeRows: ${decodeError.issue}`,
+      const validThreadId = ThreadId.make("thread-valid");
+      yield* runtimes.upsert({
+        threadId: validThreadId,
+        providerName: "codex",
+        providerInstanceId: null,
+        adapterKey: "codex",
+        runtimeMode: "full-access",
+        status: "running",
+        lastSeenAt,
+        resumeCursor: null,
+        runtimePayload: null,
+      });
+
+      const listed = yield* runtimes.list();
+      assert.deepStrictEqual(
+        listed.map((runtime) => runtime.threadId),
+        [validThreadId],
       );
-      assert.notInclude(decodeError.issue, runtimePayload);
-      assert.notInclude(decodeError.message, runtimePayload);
-      assert.notInclude(decodeError.message, lastSeenAt);
 
       yield* sql`DROP TABLE provider_session_runtime`;
       const sqlFailure = yield* Effect.flip(