diff --git a/consensus/clique/src/main/java/org/hyperledger/besu/consensus/clique/jsonrpc/methods/Propose.java b/consensus/clique/src/main/java/org/hyperledger/besu/consensus/clique/jsonrpc/methods/Propose.java
index f2b81d56e3e..6e198a84fe2 100644
--- a/consensus/clique/src/main/java/org/hyperledger/besu/consensus/clique/jsonrpc/methods/Propose.java
+++ b/consensus/clique/src/main/java/org/hyperledger/besu/consensus/clique/jsonrpc/methods/Propose.java
@@ -57,7 +57,13 @@ public JsonRpcResponse response(final JsonRpcRequestContext requestContext) {
       throw new InvalidJsonRpcParameters(
           "Invalid address parameter (index 0)", RpcErrorType.INVALID_ADDRESS_PARAMS, e);
     }
-    final Boolean auth = requestContext.getRequiredParameter(1, Boolean.class);
+    final Boolean auth;
+    try {
+      auth = requestContext.getRequiredParameter(1, Boolean.class);
+    } catch (Exception e) { // TODO:replace with JsonRpcParameter.JsonRpcParameterException
+      throw new InvalidJsonRpcParameters(
+          "Invalid auth parameter (index 1)", RpcErrorType.INVALID_PROPOSAL_PARAMS, e);
+    }
     if (address.equals(CliqueBlockInterface.NO_VOTE_SUBJECT)) {
       return new JsonRpcErrorResponse(
           requestContext.getRequest().getId(), RpcErrorType.INVALID_REQUEST);
diff --git a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/execution/TracedJsonRpcProcessor.java b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/execution/TracedJsonRpcProcessor.java
index eba3827bfaf..822c6ac895b 100644
--- a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/execution/TracedJsonRpcProcessor.java
+++ b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/execution/TracedJsonRpcProcessor.java
@@ -60,7 +60,6 @@ public JsonRpcResponse process(
         case INVALID_ACCOUNT_PARAMS:
         case INVALID_ADDRESS_HASH_PARAMS:
         case INVALID_ADDRESS_PARAMS:
-        case INVALID_AUTH_PARAMS:
         case INVALID_BLOB_COUNT:
         case INVALID_BLOB_GAS_USED_PARAMS:
         case INVALID_BLOCK_PARAMS:
@@ -104,6 +103,7 @@ public JsonRpcResponse process(
         case INVALID_PRIVACY_GROUP_PARAMS:
         case INVALID_PRIVATE_FROM_PARAMS:
         case INVALID_PRIVATE_FOR_PARAMS:
+        case INVALID_PROPOSAL_PARAMS:
         case INVALID_REMOTE_CAPABILITIES_PARAMS:
         case INVALID_REWARD_PERCENTILES_PARAMS:
         case INVALID_SEALER_ID_PARAMS:
diff --git a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/response/RpcErrorType.java b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/response/RpcErrorType.java
index 309fe498627..d46dc900c57 100644
--- a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/response/RpcErrorType.java
+++ b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/response/RpcErrorType.java
@@ -31,7 +31,6 @@ public enum RpcErrorType implements RpcMethodError {
   INVALID_ACCOUNT_PARAMS(INVALID_PARAMS_ERROR_CODE, "Invalid account params"),
   INVALID_ADDRESS_HASH_PARAMS(INVALID_PARAMS_ERROR_CODE, "Invalid address hash params"),
   INVALID_ADDRESS_PARAMS(INVALID_PARAMS_ERROR_CODE, "Invalid address params"),
-  INVALID_AUTH_PARAMS(INVALID_PARAMS_ERROR_CODE, "Invalid auth params"),
   INVALID_BLOB_COUNT(
       INVALID_PARAMS_ERROR_CODE,
       "Invalid blob count (blob transactions must have at least one blob)"),
@@ -89,6 +88,7 @@ public enum RpcErrorType implements RpcMethodError {
   INVALID_PRIVACY_GROUP_PARAMS(INVALID_PARAMS_ERROR_CODE, "Invalid privacy group params"),
   INVALID_PRIVATE_FROM_PARAMS(INVALID_PARAMS_ERROR_CODE, "Invalid private from params"),
   INVALID_PRIVATE_FOR_PARAMS(INVALID_PARAMS_ERROR_CODE, "Invalid private for params"),
+  INVALID_PROPOSAL_PARAMS(INVALID_PARAMS_ERROR_CODE, "Invalid proposal params"),
   INVALID_REMOTE_CAPABILITIES_PARAMS(
       INVALID_PARAMS_ERROR_CODE, "Invalid remote capabilities params"),
   INVALID_REWARD_PERCENTILES_PARAMS(INVALID_PARAMS_ERROR_CODE, "Invalid reward percentiles params"),