Merge pull request #7069 from BitGo/fix/WP-6057

fix(sdk-core): backup keychain creation to use correct privateMaterial for EcDSA MPCV2 wallets

Author: sasikumar-bitgo

modules/sdk-core/src/bitgo/utils/tss/ecdsa/ecdsaMPCv2.ts

@@ -321,7 +321,7 @@ export class EcdsaMPCv2Utils extends BaseEcdsaUtils {
     );
     const backupKeychainPromise = this.addBackupKeychain(
       bitgoCommonKeychain,
-      userPrivateMaterial,
+      backupPrivateMaterial,
       backupReducedPrivateMaterial,
       params.passphrase,
       params.originalPasscodeEncryptionCode