diff --git a/src/wallet/wallet.h b/src/wallet/wallet.h
--- a/src/wallet/wallet.h
+++ b/src/wallet/wallet.h
@@ -708,31 +708,6 @@
     }
 };
 
-/**
- * Private key that was serialized by an old wallet (only used for
- * deserialization) */
-struct OldKey {
-    CPrivKey vchPrivKey;
-    ADD_SERIALIZE_METHODS;
-
-    template <typename Stream, typename Operation>
-    inline void SerializationOp(Stream &s, Operation ser_action) {
-        // no longer used by the wallet, thus dropped after deserialization:
-        int64_t nTimeCreated;
-        int64_t nTimeExpires;
-        std::string strComment;
-
-        int nVersion = s.GetVersion();
-        if (!(s.GetType() & SER_GETHASH)) {
-            READWRITE(nVersion);
-        }
-        READWRITE(vchPrivKey);
-        READWRITE(nTimeCreated);
-        READWRITE(nTimeExpires);
-        READWRITE(LIMITED_STRING(strComment, 65536));
-    }
-};
-
 struct CoinSelectionParams {
     bool use_bnb = true;
     size_t change_output_size = 0;
diff --git a/src/wallet/walletdb.cpp b/src/wallet/walletdb.cpp
--- a/src/wallet/walletdb.cpp
+++ b/src/wallet/walletdb.cpp
@@ -132,7 +132,6 @@
         return false;
     }
     EraseIC(std::make_pair(DBKeys::KEY, vchPubKey));
-    EraseIC(std::make_pair(DBKeys::OLD_KEY, vchPubKey));
     return true;
 }
 
@@ -280,7 +279,7 @@
             if (fYes == '1') {
                 pwallet->LoadWatchOnly(script);
             }
-        } else if (strType == DBKeys::KEY || strType == DBKeys::OLD_KEY) {
+        } else if (strType == DBKeys::KEY) {
             CPubKey vchPubKey;
             ssKey >> vchPubKey;
             if (!vchPubKey.IsValid()) {
@@ -291,14 +290,8 @@
             CPrivKey pkey;
             uint256 hash;
 
-            if (strType == DBKeys::KEY) {
-                wss.nKeys++;
-                ssValue >> pkey;
-            } else {
-                OldKey wkey;
-                ssValue >> wkey;
-                pkey = wkey.vchPrivKey;
-            }
+            wss.nKeys++;
+            ssValue >> pkey;
 
             // Old wallets store keys as DBKeys::KEY [pubkey] => [privkey] ...
             // which was slow for wallets with lots of keys, because the public
@@ -431,6 +424,10 @@
                          "wallet flags found";
                 return false;
             }
+        } else if (strType == DBKeys::OLD_KEY) {
+            strErr = "Found unsupported 'wkey' record, try loading with "
+                     "version 0.20";
+            return false;
         } else if (strType != DBKeys::BESTBLOCK &&
                    strType != DBKeys::BESTBLOCK_NOMERKLE &&
                    strType != DBKeys::MINVERSION &&
@@ -445,8 +442,8 @@
 }
 
 bool WalletBatch::IsKeyType(const std::string &strType) {
-    return (strType == DBKeys::KEY || strType == DBKeys::OLD_KEY ||
-            strType == DBKeys::MASTER_KEY || strType == DBKeys::CRYPTED_KEY);
+    return (strType == DBKeys::KEY || strType == DBKeys::MASTER_KEY ||
+            strType == DBKeys::CRYPTED_KEY);
 }
 
 DBErrors WalletBatch::LoadWallet(CWallet *pwallet) {