diff --git a/CHANGELOG.md b/CHANGELOG.md
index 68d1dfdb9..0a130bc1e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -16,6 +16,7 @@ Docs: https://docs.clawd.bot
 - Auth profiles: keep auto-pinned preference while allowing rotation on failover; user pins stay locked. (#1138) — thanks @cheeeee.
 - macOS: avoid touching launchd in Remote over SSH so quitting the app no longer disables the remote gateway. (#1105)
 - Memory: index atomically so failed reindex preserves the previous memory database. (#1151) — thanks @gumadeiras.
+- Memory: avoid sqlite-vec unique constraint failures when reindexing duplicate chunk ids. (#1151) — thanks @gumadeiras.
 
 ## 2026.1.18-3
 
diff --git a/extensions/matrix/src/channel.directory.test.ts b/extensions/matrix/src/channel.directory.test.ts
index a88216b38..a90b9b79b 100644
--- a/extensions/matrix/src/channel.directory.test.ts
+++ b/extensions/matrix/src/channel.directory.test.ts
@@ -1,3 +1,5 @@
+import os from "node:os";
+
 import { beforeEach, describe, expect, it } from "vitest";
 
 import type { PluginRuntime } from "clawdbot/plugin-sdk";
@@ -8,7 +10,11 @@ import { setMatrixRuntime } from "./runtime.js";
 
 describe("matrix directory", () => {
   beforeEach(() => {
-    setMatrixRuntime({} as PluginRuntime);
+    setMatrixRuntime({
+      state: {
+        resolveStateDir: () => os.tmpdir(),
+      },
+    } as PluginRuntime);
   });
 
   it("lists peers and groups from config", async () => {
diff --git a/src/memory/manager.ts b/src/memory/manager.ts
index 0e463d4d4..0994c7379 100644
--- a/src/memory/manager.ts
+++ b/src/memory/manager.ts
@@ -1406,8 +1406,11 @@ export class MemoryIndexManager {
           now,
         );
       if (vectorReady && embedding.length > 0) {
+        try {
+          this.db.prepare(`DELETE FROM ${VECTOR_TABLE} WHERE id = ?`).run(id);
+        } catch {}
         this.db
-          .prepare(`INSERT OR REPLACE INTO ${VECTOR_TABLE} (id, embedding) VALUES (?, ?)`)
+          .prepare(`INSERT INTO ${VECTOR_TABLE} (id, embedding) VALUES (?, ?)`)
           .run(id, vectorToBlob(embedding));
       }
       if (this.fts.enabled && this.fts.available) {