diff --git a/demo/redirect-flow-example/package-lock.json b/demo/redirect-flow-example/package-lock.json
index 31dcb1ba..12059871 100644
--- a/demo/redirect-flow-example/package-lock.json
+++ b/demo/redirect-flow-example/package-lock.json
@@ -15,7 +15,7 @@
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-        "@web3auth/mpc-core-kit": "file://../../",
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@@ -46,12 +46,12 @@
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+      "version": "2.3.0",
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@@ -62,6 +62,7 @@
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diff --git a/demo/redirect-flow-example/package.json b/demo/redirect-flow-example/package.json
index 635a1c18..6c7f6ff6 100644
--- a/demo/redirect-flow-example/package.json
+++ b/demo/redirect-flow-example/package.json
@@ -10,7 +10,7 @@
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diff --git a/package-lock.json b/package-lock.json
index 9b54d0c2..cabcd7d8 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -20,6 +20,7 @@
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@@ -3951,6 +3578,28 @@
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       }
     },
+    "node_modules/@tkey-mpc/common-types/node_modules/@toruslabs/http-helpers": {
+      "version": "5.0.0",
+      "resolved": "https://registry.npmjs.org/@toruslabs/http-helpers/-/http-helpers-5.0.0.tgz",
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+      "dependencies": {
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+        "loglevel": "^1.8.1"
+      },
+      "engines": {
+        "node": ">=18.x",
+        "npm": ">=9.x"
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+      },
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@@ -3995,6 +3644,28 @@
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@@ -4054,6 +3725,28 @@
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     "node_modules/@tkey-mpc/service-provider-torus/node_modules/@toruslabs/torus.js": {
       "version": "11.0.6",
       "resolved": "https://registry.npmjs.org/@toruslabs/torus.js/-/torus.js-11.0.6.tgz",
@@ -4351,28 +4044,6 @@
         "@babel/runtime": "7.x"
       }
     },
-    "node_modules/@toruslabs/base-session-manager/node_modules/@toruslabs/http-helpers": {
-      "version": "6.1.1",
-      "resolved": "https://registry.npmjs.org/@toruslabs/http-helpers/-/http-helpers-6.1.1.tgz",
-      "integrity": "sha512-bJYOaltRzklzObhRdutT1wau17vXyrCCBKJOeN46F1t99MUXi5udQNeErFOcr9qBsvrq2q67eVBkU5XOeBMX5A==",
-      "dependencies": {
-        "lodash.merge": "^4.6.2",
-        "loglevel": "^1.9.1"
-      },
-      "engines": {
-        "node": ">=18.x",
-        "npm": ">=9.x"
-      },
-      "peerDependencies": {
-        "@babel/runtime": "^7.x",
-        "@sentry/types": "^7.x"
-      },
-      "peerDependenciesMeta": {
-        "@sentry/types": {
-          "optional": true
-        }
-      }
-    },
     "node_modules/@toruslabs/broadcast-channel": {
       "version": "8.0.0",
       "resolved": "https://registry.npmjs.org/@toruslabs/broadcast-channel/-/broadcast-channel-8.0.0.tgz",
@@ -4406,9 +4077,9 @@
       }
     },
     "node_modules/@toruslabs/constants": {
-      "version": "13.3.0",
-      "resolved": "https://registry.npmjs.org/@toruslabs/constants/-/constants-13.3.0.tgz",
-      "integrity": "sha512-i/fX5DeEUj4EoQmFT8YdO8bwN7Na83zZq6RrSmOpRmVA0F7MMbUsxhsvAp/kOmceg0lU1ZHQTTJRmh7OTExaIw==",
+      "version": "13.4.0",
+      "resolved": "https://registry.npmjs.org/@toruslabs/constants/-/constants-13.4.0.tgz",
+      "integrity": "sha512-CjmnMQ5Oj0bqSBGkhv7Xm3LciGJDHwe4AJ1LF6mijlP+QcCnUM5I6kVp60j7zZ/r0DT7nIEiuHHHczGpCZor0A==",
       "engines": {
         "node": ">=18.x",
         "npm": ">=9.x"
@@ -4792,12 +4463,12 @@
       "dev": true
     },
     "node_modules/@toruslabs/fetch-node-details": {
-      "version": "13.3.0",
-      "resolved": "https://registry.npmjs.org/@toruslabs/fetch-node-details/-/fetch-node-details-13.3.0.tgz",
-      "integrity": "sha512-UXU2ZnJ954ZvyWYbN0n5rXrIYkNjipTuXsNyLCtWgNU5zkf1ODGE6uNeEbA3LbdUCQj6r9GPIY9hQgKYyzjlhw==",
+      "version": "13.4.0",
+      "resolved": "https://registry.npmjs.org/@toruslabs/fetch-node-details/-/fetch-node-details-13.4.0.tgz",
+      "integrity": "sha512-WTfI47Q5sldlz4nh8kNPI95PXm3hjm3IEDnYRY3rlcCrs9sVwdQItKf4D0i5s9sRmwLIpG3po+IpEcdO82CIuA==",
       "dependencies": {
-        "@toruslabs/constants": "^13.3.0",
-        "@toruslabs/fnd-base": "^13.3.0",
+        "@toruslabs/constants": "^13.4.0",
+        "@toruslabs/fnd-base": "^13.4.0",
         "@toruslabs/http-helpers": "^6.1.1",
         "loglevel": "^1.9.1"
       },
@@ -4832,11 +4503,11 @@
       }
     },
     "node_modules/@toruslabs/fnd-base": {
-      "version": "13.3.0",
-      "resolved": "https://registry.npmjs.org/@toruslabs/fnd-base/-/fnd-base-13.3.0.tgz",
-      "integrity": "sha512-sxIO+Seg6f3SxwZ++W92b2nY7KvA/atfrixuu9tz1JTQD6IMKQqq0MtYvsm8A4+e1CMrFetCeL9KQv3HeITH8w==",
+      "version": "13.4.0",
+      "resolved": "https://registry.npmjs.org/@toruslabs/fnd-base/-/fnd-base-13.4.0.tgz",
+      "integrity": "sha512-Fc3uFj5ZfDmR4uWAMRyLVvBsSLXJWBHQoHOsucVqvxXpNeLSrFEQIxqlXsgjRfQPOSKtpljSl1MaXibhb5/hfA==",
       "dependencies": {
-        "@toruslabs/constants": "^13.3.0"
+        "@toruslabs/constants": "^13.4.0"
       },
       "engines": {
         "node": ">=18.x",
@@ -4847,12 +4518,12 @@
       }
     },
     "node_modules/@toruslabs/http-helpers": {
-      "version": "5.0.0",
-      "resolved": "https://registry.npmjs.org/@toruslabs/http-helpers/-/http-helpers-5.0.0.tgz",
-      "integrity": "sha512-GmezWz9JeF6YyhjLSm+9XDF4YaeICEckY0Jbo43i86SjhfJYgRWqEi63VSiNsaqc/z810Q0FQvEk1TnBRX2tgA==",
+      "version": "6.1.1",
+      "resolved": "https://registry.npmjs.org/@toruslabs/http-helpers/-/http-helpers-6.1.1.tgz",
+      "integrity": "sha512-bJYOaltRzklzObhRdutT1wau17vXyrCCBKJOeN46F1t99MUXi5udQNeErFOcr9qBsvrq2q67eVBkU5XOeBMX5A==",
       "dependencies": {
         "lodash.merge": "^4.6.2",
-        "loglevel": "^1.8.1"
+        "loglevel": "^1.9.1"
       },
       "engines": {
         "node": ">=18.x",
@@ -4887,28 +4558,6 @@
         "@babel/runtime": "7.x"
       }
     },
-    "node_modules/@toruslabs/metadata-helpers/node_modules/@toruslabs/http-helpers": {
-      "version": "6.1.1",
-      "resolved": "https://registry.npmjs.org/@toruslabs/http-helpers/-/http-helpers-6.1.1.tgz",
-      "integrity": "sha512-bJYOaltRzklzObhRdutT1wau17vXyrCCBKJOeN46F1t99MUXi5udQNeErFOcr9qBsvrq2q67eVBkU5XOeBMX5A==",
-      "dependencies": {
-        "lodash.merge": "^4.6.2",
-        "loglevel": "^1.9.1"
-      },
-      "engines": {
-        "node": ">=18.x",
-        "npm": ">=9.x"
-      },
-      "peerDependencies": {
-        "@babel/runtime": "^7.x",
-        "@sentry/types": "^7.x"
-      },
-      "peerDependenciesMeta": {
-        "@sentry/types": {
-          "optional": true
-        }
-      }
-    },
     "node_modules/@toruslabs/openlogin": {
       "version": "6.2.11",
       "resolved": "https://registry.npmjs.org/@toruslabs/openlogin/-/openlogin-6.2.11.tgz",
@@ -5106,6 +4755,28 @@
         "@babel/runtime": "7.x"
       }
     },
+    "node_modules/@toruslabs/secure-pub-sub/node_modules/@toruslabs/http-helpers": {
+      "version": "5.0.0",
+      "resolved": "https://registry.npmjs.org/@toruslabs/http-helpers/-/http-helpers-5.0.0.tgz",
+      "integrity": "sha512-GmezWz9JeF6YyhjLSm+9XDF4YaeICEckY0Jbo43i86SjhfJYgRWqEi63VSiNsaqc/z810Q0FQvEk1TnBRX2tgA==",
+      "dependencies": {
+        "lodash.merge": "^4.6.2",
+        "loglevel": "^1.8.1"
+      },
+      "engines": {
+        "node": ">=18.x",
+        "npm": ">=9.x"
+      },
+      "peerDependencies": {
+        "@babel/runtime": "^7.x",
+        "@sentry/types": "^7.x"
+      },
+      "peerDependenciesMeta": {
+        "@sentry/types": {
+          "optional": true
+        }
+      }
+    },
     "node_modules/@toruslabs/torus-scripts": {
       "version": "5.3.1",
       "resolved": "https://registry.npmjs.org/@toruslabs/torus-scripts/-/torus-scripts-5.3.1.tgz",
@@ -5200,10 +4871,32 @@
         "@babel/runtime": "7.x"
       }
     },
+    "node_modules/@toruslabs/torus.js/node_modules/@toruslabs/http-helpers": {
+      "version": "5.0.0",
+      "resolved": "https://registry.npmjs.org/@toruslabs/http-helpers/-/http-helpers-5.0.0.tgz",
+      "integrity": "sha512-GmezWz9JeF6YyhjLSm+9XDF4YaeICEckY0Jbo43i86SjhfJYgRWqEi63VSiNsaqc/z810Q0FQvEk1TnBRX2tgA==",
+      "dependencies": {
+        "lodash.merge": "^4.6.2",
+        "loglevel": "^1.8.1"
+      },
+      "engines": {
+        "node": ">=18.x",
+        "npm": ">=9.x"
+      },
+      "peerDependencies": {
+        "@babel/runtime": "^7.x",
+        "@sentry/types": "^7.x"
+      },
+      "peerDependenciesMeta": {
+        "@sentry/types": {
+          "optional": true
+        }
+      }
+    },
     "node_modules/@toruslabs/tss-client": {
-      "version": "2.3.2",
-      "resolved": "https://registry.npmjs.org/@toruslabs/tss-client/-/tss-client-2.3.2.tgz",
-      "integrity": "sha512-oAb05DH+IUlI/cn/APwwhd9855/YhpfOArDr+f0SLXZgI+NnXNzSwR5JwzMjYJyiR4QEZRgo2oLdH+xLWKBpyA==",
+      "version": "2.3.3",
+      "resolved": "https://registry.npmjs.org/@toruslabs/tss-client/-/tss-client-2.3.3.tgz",
+      "integrity": "sha512-vWye8ax24TSpmLCw1eSsKFesr1MOZ+lsfJ/Z2+eHMVOt/Zq5WnqbYBOiU3yA8h80IrZEcvdP+5LiHH5pH8SEKw==",
       "dependencies": {
         "@toruslabs/eccrypto": "^4.0.0",
         "@toruslabs/tss-lib": "^2.3.0",
@@ -5370,9 +5063,9 @@
       "integrity": "sha512-nG96G3Wp6acyAgJqGasjODb+acrI7KltPiRxzHPXnP3NgI28bpQDRv53olbqGXbfcgF5aiiHmO3xpwEpS5Ld9g=="
     },
     "node_modules/@types/node": {
-      "version": "20.12.8",
-      "resolved": "https://registry.npmjs.org/@types/node/-/node-20.12.8.tgz",
-      "integrity": "sha512-NU0rJLJnshZWdE/097cdCBbyW1h4hEg0xpovcoAQYHl8dnEyp/NAOiE45pvc+Bd1Dt+2r94v2eGFpQJ4R7g+2w==",
+      "version": "20.12.10",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-20.12.10.tgz",
+      "integrity": "sha512-Eem5pH9pmWBHoGAT8Dr5fdc5rYA+4NAovdM4EktRPVAAiJhmWWfQrA0cFhAbOsQdSfIHjAud6YdkbL69+zSKjw==",
       "dependencies": {
         "undici-types": "~5.26.4"
       }
@@ -5920,28 +5613,6 @@
         "npm": ">=9.x"
       }
     },
-    "node_modules/@web3auth/base-provider/node_modules/@toruslabs/http-helpers": {
-      "version": "6.0.0",
-      "resolved": "https://registry.npmjs.org/@toruslabs/http-helpers/-/http-helpers-6.0.0.tgz",
-      "integrity": "sha512-/KrISB9fGV2TM+5Z+0CGj24d/G08kqbB+kodO3nbwNcS0a55dpy+RiB0naF3H1gbEt4Ah5YH8qCDyAZ+zcR2FQ==",
-      "dependencies": {
-        "lodash.merge": "^4.6.2",
-        "loglevel": "^1.8.1"
-      },
-      "engines": {
-        "node": ">=18.x",
-        "npm": ">=9.x"
-      },
-      "peerDependencies": {
-        "@babel/runtime": "^7.x",
-        "@sentry/types": "^7.x"
-      },
-      "peerDependenciesMeta": {
-        "@sentry/types": {
-          "optional": true
-        }
-      }
-    },
     "node_modules/@web3auth/base-provider/node_modules/@toruslabs/openlogin-jrpc": {
       "version": "6.2.11",
       "resolved": "https://registry.npmjs.org/@toruslabs/openlogin-jrpc/-/openlogin-jrpc-6.2.11.tgz",
@@ -5995,28 +5666,6 @@
         "node": "^12.22.0 || ^14.17.0 || >=16.0.0"
       }
     },
-    "node_modules/@web3auth/base/node_modules/@toruslabs/http-helpers": {
-      "version": "6.0.0",
-      "resolved": "https://registry.npmjs.org/@toruslabs/http-helpers/-/http-helpers-6.0.0.tgz",
-      "integrity": "sha512-/KrISB9fGV2TM+5Z+0CGj24d/G08kqbB+kodO3nbwNcS0a55dpy+RiB0naF3H1gbEt4Ah5YH8qCDyAZ+zcR2FQ==",
-      "dependencies": {
-        "lodash.merge": "^4.6.2",
-        "loglevel": "^1.8.1"
-      },
-      "engines": {
-        "node": ">=18.x",
-        "npm": ">=9.x"
-      },
-      "peerDependencies": {
-        "@babel/runtime": "^7.x",
-        "@sentry/types": "^7.x"
-      },
-      "peerDependenciesMeta": {
-        "@sentry/types": {
-          "optional": true
-        }
-      }
-    },
     "node_modules/@web3auth/base/node_modules/@toruslabs/openlogin-jrpc": {
       "version": "6.2.11",
       "resolved": "https://registry.npmjs.org/@toruslabs/openlogin-jrpc/-/openlogin-jrpc-6.2.11.tgz",
diff --git a/package.json b/package.json
index d45e2a2f..e1c1a162 100644
--- a/package.json
+++ b/package.json
@@ -57,7 +57,8 @@
     "@web3auth/base-provider": "^7.0.1",
     "bn.js": "^5.2.1",
     "bowser": "^2.11.0",
-    "elliptic": "^6.5.5"
+    "elliptic": "^6.5.5",
+    "@toruslabs/http-helpers": "6.1.1"
   },
   "devDependencies": {
     "@babel/register": "^7.23.7",
@@ -93,13 +94,13 @@
   },
   "overrides": {
     "@tkey-mpc/storage-layer-torus": {
-      "@toruslabs/http-helpers": "^6.0.0"
+      "@toruslabs/http-helpers": "^6.1.1"
     },
     "@toruslabs/base-session-manager": {
-      "@toruslabs/http-helpers": "^6.0.0"
+      "@toruslabs/http-helpers": "^6.1.1"
     },
     "@toruslabs/customauth": {
-      "@toruslabs/http-helpers": "^6.0.0"
+      "@toruslabs/http-helpers": "^6.1.1"
     }
   },
   "lint-staged": {
diff --git a/src/mpcCoreKit.ts b/src/mpcCoreKit.ts
index f6e88801..558c92c7 100644
--- a/src/mpcCoreKit.ts
+++ b/src/mpcCoreKit.ts
@@ -589,17 +589,18 @@ export class Web3AuthMPCCoreKit implements ICoreKit {
       }
       await this.inputFactorKey(new BN(deviceFactorKey, "hex"));
 
+      // only recovery factor = true
+      let backupFactorKey = "";
+      if (recoveryFactor) {
+        backupFactorKey = await this.createFactor({ shareType: TssShareType.RECOVERY, ...enableMFAParams });
+      }
+
       const hashedFactorPub = getPubKeyPoint(hashedFactorKey);
       await this.deleteFactor(hashedFactorPub, hashedFactorKey);
       await this.deleteMetadataShareBackup(hashedFactorKey);
 
-      // only recovery factor = true
-      if (recoveryFactor) {
-        const backupFactorKey = await this.createFactor({ shareType: TssShareType.RECOVERY, ...enableMFAParams });
-        return backupFactorKey;
-      }
       // update to undefined for next major release
-      return "";
+      return backupFactorKey;
     } catch (err: unknown) {
       log.error("error enabling MFA", err);
       throw new Error((err as Error).message);
@@ -940,9 +941,10 @@ export class Web3AuthMPCCoreKit implements ICoreKit {
       if (!this.options.manualSync) await this.commitChanges();
     } else {
       if (importTssKey) throw new Error("Cannot import tss key for existing user");
-      await this.tKey.initialize({ neverInitializeNewKey: true });
       const hashedFactorKey = getHashedPrivateKey(this.state.oAuthKey, this.options.hashedFactorNonce);
-      if ((await this.checkIfFactorKeyValid(hashedFactorKey)) && !this.options.disableHashedFactorKey) {
+      const isHashedFactorKeyValid = await this.checkIfFactorKeyValid(hashedFactorKey);
+      await this.tKey.initialize({ neverInitializeNewKey: true });
+      if (isHashedFactorKeyValid && !this.options.disableHashedFactorKey) {
         // Initialize tkey with existing hashed share if available.
         const factorKeyMetadata: ShareStore = await this.getFactorKeyMetadata(hashedFactorKey);
         try {
@@ -1012,6 +1014,7 @@ export class Web3AuthMPCCoreKit implements ICoreKit {
       }
     } catch (err) {
       log.error("error trying to authorize session", err);
+      throw err;
     }
   }
 
@@ -1027,6 +1030,7 @@ export class Web3AuthMPCCoreKit implements ICoreKit {
       if (!oAuthKey || !factorKey || !tssShare || !tssPubKey || !userInfo) {
         throw new Error("User not logged in");
       }
+
       const payload: SessionData = {
         oAuthKey,
         factorKey: factorKey?.toString("hex"),
@@ -1046,7 +1050,8 @@ export class Web3AuthMPCCoreKit implements ICoreKit {
   private async isMetadataPresent(privateKey: string) {
     const privateKeyBN = new BN(privateKey, "hex");
     const metadata = await this.tKey?.storageLayer.getMetadata<{ message: string }>({ privKey: privateKeyBN });
-    if (metadata && Object.keys(metadata).length > 0 && metadata.message !== "KEY_NOT_FOUND") {
+
+    if (metadata && Object.keys(metadata).length > 0 && metadata.message !== "KEY_NOT_FOUND" && metadata.message !== "SHARE_DELETED") {
       return true;
     }
     return false;
@@ -1068,6 +1073,9 @@ export class Web3AuthMPCCoreKit implements ICoreKit {
     if (!factorKeyMetadata || factorKeyMetadata.message === "KEY_NOT_FOUND") {
       throw new Error("no metadata for your factor key, reset your account");
     }
+    if (factorKeyMetadata.message === "SHARE_DELETED") {
+      throw new Error("no metadata for your factor key, deleted.");
+    }
     return ShareStore.fromJSON(factorKeyMetadata);
   }
 
@@ -1088,6 +1096,13 @@ export class Web3AuthMPCCoreKit implements ICoreKit {
     if (!this.state.factorKey) {
       throw new Error("factorKey not present");
     }
+    // validate the current factor key
+    // current factor might be deleted from other instnaces,
+    // so it's better to validate it before we creating any shares
+    const factorKeyMetadata = await this.tKey?.storageLayer.getMetadata<StringifiedType>({ privKey: this.getCurrentFactorKey().factorKey });
+    if (factorKeyMetadata?.message === SHARE_DELETED) {
+      throw new Error("Current factorKey is not valid");
+    }
     if (VALID_SHARE_INDICES.indexOf(newFactorTSSIndex) === -1) {
       throw new Error(`invalid new share index: must be one of ${VALID_SHARE_INDICES}`);
     }
diff --git a/tests/factors.spec.ts b/tests/factors.spec.ts
index 14d43eb2..ba145897 100644
--- a/tests/factors.spec.ts
+++ b/tests/factors.spec.ts
@@ -39,7 +39,7 @@ export const FactorManipulationTest = async (
       await coreKitInstance.logout();
     });
 
-    await t.test("should able to create factor", async function () {
+    await t.test("should be able to create factor", async function () {
       const coreKitInstance = await newInstance();
       coreKitInstance.setTssWalletIndex(1);
 
@@ -60,6 +60,11 @@ export const FactorManipulationTest = async (
         throw new Error("should not reach here");
       } catch {}
 
+      // sync
+      if (testVariable.manualSync) {
+        await coreKitInstance.commitChanges();
+      }
+
       // create factor
       const factorKey1 = await coreKitInstance.createFactor({
         shareType: TssShareType.DEVICE,
@@ -141,6 +146,9 @@ export const FactorManipulationTest = async (
 
     await t.test("enable MFA", async function () {
       const instance = await newInstance();
+      if (testVariable.manualSync) {
+        await instance.commitChanges();
+      }
       instance.setTssWalletIndex(1);
       const recoverFactor = await instance.enableMFA({});
 
@@ -184,7 +192,7 @@ const variable: FactorTestVariable[] = [
   { types: TssShareType.RECOVERY, manualSync: false, asyncStorage: new AsyncMemoryStorage() },
 ];
 
-const email = "testmail102";
+const email = "testmail08_manipulate_factor";
 variable.forEach(async (testVariable) => {
   const newCoreKitLogInInstance = async (ignoreError: boolean) => {
     const instance = new Web3AuthMPCCoreKit({